Why has no one mentioned the fact that Wolverine was clearly shown to have served in Vietnam in Origins. Yet in Days of Future Past when Logan is sent back he just wakes up as a body guard for a mob boss?

Oh, look! Moria MacTaggert as I remember her in the comics. A brilliant geneticist and not a gun-toting secret agent in underwear... for... reasons.

The real loss to the timestream was Olivia Williams on the big screen.

because Biff has the Sports Almanac.

I doubt Trask had any compunctions against drug-induced comas for his test subjects.

We do get to see one of Angel's wings in the exhibit from where Magneto retrieves his very rusty discolored helmet. But Azazel? How do you keep this guy in captivity? And tornado guy? Drugged and sedated or in a controlled coma?

Bill Duke Senator Bolivar Trask is Peter Dinklage Dr Bolivar Trask's son? Relative? Adopted son? Identity thief? It is a pretty cool name.

And yet young Magneto is basically the exact opposite of helpful, very nearly terrifying humanity into wanting to kill all mutants on his own. Did Old Magneto forget what an insane asshole he was back in the '70s?

After Wolverine lost his adamantium claws in The Wolverine, how does he again have them in the original apocalyptic DoFP future?

Also, why does Wolverine have metal claws in the future after what happens in The Wolverine?

To be fair, Boliver isn't the only Trask in the comics. There is his son Larry, another relative named Donald and yet another named Simon. Duke looks like a Donald, so there you go.

It's Mystique in disguise. His eyes flashed and I'm pretty sure they also played her wonky music a little there just so people would get it.

It's that adaptive-morphing technology he developed after capturing Mystique, obviously...

I could have happily done without that Mystique as Stryker thing at the end. I really hope it is for a reason in the next movie, cause otherwise it was kinda dumb. Especially as I see no reason that she would have cared enough to take him. And coincidentally known enough to pretend to be the man who had taken him in…

Q: How did Dr McCoy go from looking like this?

I'm going with the theory that says that instead of being a adaptation of the comics, these movies are in fact an adaptation of a kid reading the X-Men entry in wikipedia out loud to someone. So he kinda of forget things that he already addressed, fucks up with the years things were supposed to happen, who died and…

Sabretooth in X1 looks a lot more animal-like. I would not be surprised if somewhere between Wolverine Origins and X1 he had some sort of added mutation. Perhaps even at the hands of the Weapon X program. This could cause his general lessening of intelligence, and then failing to know people is a result of that.

Really it retconned everything except for the opening parts of X-Men Origins Wolverine set before 1973 and First Class. Everything else (X-Men, X2, Last Stand, most of Origins, and The Wolverine) was retconned. The only place those cannons still exist is in future Wolverine's memory (post-2023).

Answer to all these questions: the money train will find a way...