What were the continuity errors again? Let's review...
- Charles says he met Erik at 17. Perhaps they met in passing before the events of First Class and didn't realize until much later.
- Charles says Erik helped build Cerebro. Maybe just the specific version of Cerebro during the short stint they were pals in the 80s, while Beast and Charles built the first prototype in FC.
- Sabretooth looks and acts completely different in O:W (late 70s/early 80s) and in X-Men (early 00s). His mutation and advanced aging can be blamed. In 2020 he'll be even more of an animal...
- Emma Frost in FC and (the much younger) Emma Silverfox in O:W with the same powers. Maybe they are relatives and Emma is a family name.
- Child "Storm" easter egg in FC. Is this Ororo's mother as a child carrying the x-gene long before Storm was born?
- Colossus is gigantic and Russian in DP and not so much otherwise. The timeline change causes him to be raised in Russia instead of the US. He does much more weight training, until he becomes a teacher in 2020 and trims down.
- Caliban seen in Apocalypse and in Logan. ~30 years old in X:A and ~75 in Logan. His mutation also gives him a longevity boost.
- Character ages in general. The X-gene gives varying longevity boosts across the board.
- Professor Xavier is alive (in his own body?) and still paralyzed in TW/DoFP. This one's hard to rectify but the official word is it was his brain-dead twin he transferred his consciousness into, somehow making it paraplegic in the process?
- Moira is a young adult human in the 60s and retains her youth in the 2000s. 24 in 1962 and 68 in 2006 with heavily dyed hair and some subtle cosmetic surgery? Not ideal but possible.
- Angel in Apocalypse 20+ years older than in X3. He would have had to have been born before 1973 for this to make sense... Time-river ripples change his birth date retroactively?
- Wade Wilson youthful in both O:W (70s/80s) and pre-mutation in DP (2015). This is a tough one and would make him ~55 in 2015. Time-river ripples again I guess.
Can't think of any more right now. But that's most of my current head-canon. Overall not *too* bad. But I really wish they'd start at least considering continuity a little bit more than they do currently.
I like the rationale of how the things Charles stated regarding Erik were all lies to give their relationship more significance to likely repress a major fallout.
Sabretooth becoming more feral is a nice touch, sort of the reverse for Beast.
Emma Frost clones.
Those little kid teases in FC just seemed more like neat references than anything of value for the narrative.
Colossus's mutation changes in the new timeline, which includes growing in size on top of his normal ability.
Merchant's Caliban, mostly because of the makeup, looks much older than Apoc's as is.
The greatest irony of all, his twin was also a paraplegic
Yeah, going with Moira's daughter. Black Trask is adopted.
Different Angels along with all those other different vaguely familiar characters.
Wade Wilson has an older doppleganger.
Honestly, I much prefer to see them as alternate realities "crossing streams"
Original timeline left unchanged (incorporates Wolverine trilogy)
Revised Original timeline (incorporates DOFP future with all the various shifts)
FC timeline (incorporates Deadpool)