Merge of Fulcrum and One Above All's chronologies

[NexusOfNightmares]

Per the Marvel DK book, the popular fan theory has been confirmed into continuity.

And for anyone who says that the DK books aren't part of continuity, the Official F.A.Q. recognizes them as a type of handbook:
"Dorling Kindersley's Ultimate Guide range, which thus far has covered Spider-Man, the X-Men, the Hulk and the Fantastic Four."

The book also had collaboration by several Marvel writers, including Tom Brevoort.

As for the change, it would be quite simple:
E 7-BTS
E 13-OP
T 287-FB
T 287
T 288
T 289
T 291
SECWARSII 6
SECWARSII 7
{XF 48}
XF 49
XF 50
FF@ 23/3
IG 3
IG 4
IG 5
IG 6
WLOCK&TIW 1
WLOCK&TIW 19
E4 7
E4 8
E4 9-FB

[loki]

Per the Marvel DK book, the popular fan theory has been confirmed into continuity.

And for anyone who says that the DK books aren't part of continuity, the Official F.A.Q. recognizes them as a type of handbook:
"Dorling Kindersley's Ultimate Guide range, which thus far has covered Spider-Man, the X-Men, the Hulk and the Fantastic Four."

The DK books aren't recognized as a type of handbook, and the FAQ says as much:
"In addition to the above"

• "there have also been a few other guides to aspects of the Marvel Universe NOT CONSIDERED part of any version of the Official Handbooks above:
  ...
  Dorling Kindersley's Ultimate Guide range"
  
  In terms of Fulcrum being the same as One-Above-All, that's possible but not confirmed. There has been a handbook-style entry on the One-Above-All, which was published in the Marvel Fact Files, and that is considered official since (unlike the DK books) the Fact Files were checked over and approved by the same senior Marvel US editorial team that check over and approve the handbooks. Here's what it had to say:
  
  Though exactly who outranks who amidst the hierarchy of cosmic entities is difficult to divine, all agree that the Living Tribunal, arbiter for an entire multiverse, has few peers, and only one being he considers his superior and master, an entity “from Above” whose laws the Tribunal enforces. Supposedly omnipotent and omniscient, and residing beyond space and time, this being allegedly created all life in the Tribunal’s multiverse. Considered the ultimate creator, some identify him as God, but others prefer the “Supreme Will” or variations on the descriptive title, “the One-Above-All” (not to be confused with either the similarly named Deonist god or the leader of the Celestials). The demon Mephisto prefers a schoolyard analogy: the Living Tribunal is “the biggest kid in all the playgrounds” while God is “the Principal.” Even beings considered gods by less powerful lifeforms, such as the Asgardians, or the Watchers, who seek to monitor all existence, acknowledge the One-Above-All’s position as “creator of all universes.” During a brief experience with omni-reality perception, Thanos snatched a fragmentary glimpse of the One-Above-All. A Death-worshipper, he loathed what he saw, and sought to avoid all subsequent contact.
  
  In a multiverse replete with beings making false claim to divinity, few can be sure they have truly encountered God, and even they may not have met the One-Above-All. When he met Howard the Duck in Hell, God said he preferred to be called Yah, short for Yahweh, pointing out that God was a noun, not his name. Yah admitted to creating the whole multiverse, but revealed it had been a work for hire, noting that other multiverses existed, created by “other suppliers.” Later, while visiting “God’s Realm” to retrieve the slain Thing, the Fantastic Four met the “Maker,” who appeared as an artist working from his studio. Before the “Almighty” returned his guests to Earth, they learned he was creating reality with an unidentified collaborator. Subsequently, when the Hand slew Ghost Rider, God resurrected him and returned him to Earth backed by an angelic host. In Reality-691’s 30th Century, the brash Protégé challenged the One-Above-All’s rule, but was defeated by the Living Tribunal, while circa 12,000A.D. in Reality-14161, the mad artificial intelligence Dimitrios confronted God, in parrot form, while seeking to destroy the universe.
  
  Others have encountered beings who might be God. A glowing, seemingly divine, figure restored the dying Beta Ray Bill after Asteroth nearly slew him, while a bedraggled man with mysterious powers advised Spider-Man to accept death as a natural part of life when Aunt May was dying from a gunshot wound; he provided no name, but insisted Spider-Man should know who he was. When the time-travelling KalAOL visited Earth’s prehistoric past, he met someone he thought was God, but who insisted on being called Jack. Perhaps coincidentally, the allegedly all-powerful Fulcrum also likes to be called Jack, but the Celestials describe him as the “essence of what holds reality in place,” a description that would fit the One-Above-All.
  
  Only Thanos and Adam Warlock have undeniably spoken to the genuine One-Above-All, entreating it to restore the universe after Warlock inadvertently destroyed reality itself. Appearing alternatively as male and female, the One-Above-All agreed to do so, in exchange for Adam becoming the slain Living Tribunal’s replacement.
  
  Is God the One-Above-All?
  The One-Above-All has been called God many times thanks to its being considered the multiverse’s ultimate creator, but this does not mean that every seeming appearance of God is actually the One-Above-All. Just as various demons claim to being the true Satan, all apparently spuriously, the various appearances of God may be the result of one or more imposters, no more truly divine than the Asgardians or Olympians. Despite the “ultimate creator” claim, Yah informed Howard the Duck that there were other suppliers building their own universes, while the God who met the Fantastic Four had a collaborator. Perhaps this was evidence that neither was the true One-Above-All, but if they were, then the very title “Above-All” would seem to only be accurate within the One-Above-All’s own multiverse. Beyond that lies a larger Omniverse, a myriad of multiverses with their own cosmic forces and supreme beings.

[zuckyd1]

On the subject of what is not considered an official reference, I'm surprised that the Conan handbook and the 6-volume Marvel Encyclopedia are listed in that category in the FAQ.

[loki]

On the subject of what is not considered an official reference, I'm surprised that the Conan handbook and the 6-volume Marvel Encyclopedia are listed in that category in the FAQ.

Each of the listed guides are left out of the handbook counts for differing reasons; it's not all to do with editorial oversight or whether they count as "official continuity" as the OP mentioned. In hindsight I should have included the various Index series in the latter list, since they are "guides to aspects of the Marvel Universe" but clearly not handbooks. In terms of the Encyclopedia, if we left out 3, which is an encyclopedia in name only, then the others might have been counted, especially the last three, which was where many writers who would go on to the handbooks (myself included), got started.