"Logan" is an alternate universe - case closed.

Point by point:

1- The New Mutants is set in the mainstream X-Men universe. In the movie, Transigen-Alkali doesn't exist, Essex Corporation is definitely confirmed as the organization behind the Weapon X Program, and footage from Logan 2017 is rearranged to back-up a different event.

2- At the end of Dark Phoenix (1992), mutants are no more seen in a "friendly" way. I doubt that humans would issue comic books about them in the 2000s/2010s or so. Also, Old Man Logan seems to imply that "fantastic/fantasy adventures" (like events depicted in 'Apocalypse', 'Dark Phoenix' and so on) did not occur at all.

3- Old Man Logan killed the scientists in his version of the Weapon X Program. Our Logan never did that in Apocalypse; indeed he only slaughtered the soldiers.

4- There was no Transigen-Alkali in Apocalypse. The Weapon X Facility was owned by the Essex Corporation.

5- There was no adamantium bullet in Apocalypse. In the original timeline, the adamantium bullet had been already used anyway, and it wasn't available anymore.

6- There were mutant children at the school in the positive ending of DOFP (2023). This means that mutant births didn't stop in 2004, I mean in the mainstream X-Men universe. You can also spot Nate Grey among the children.

7- In DOFP, Phoenix is alive. In the deleted scene of Logan 2017, Old Man Logan talks about killing Jean and his long time remorse. That said, I doubt that Phoenix wouldn't be able to stop Xavier from killing the X-Men.

8- They never talk about the time-travelling issue. Logan 2017 follows the original timeline (at least, a tweaked version/variant of it).

9- Caliban is totally different. He's another guy.

10- Old Man Logan is supposed to have been "masked and costumed" in his X-Man days, wearing the comic book costume.

11- Charles is 90 years old in Logan (2029). In the mainstream X-Men universe, he is born in 1932, not 1938. Maybe... (this is another story LOL).

12- At the end of Dark Phoenix, we see that Xavier's school was renamed after JEAN GREY.
In the positive ending of DOFP, they never mentioned the name of the school anyway, so that's still consistent with DP.


MARVEL officially listed the "Logan" universe as Earth-17315.


Logan 2017 invalidates all the X-Men movies. Mutants become extinct. The X-Men have lost. Xavier's dream is dead. It's the "worst" ending ever.
It's an alternate, What If-like universe.
Even MARVEL confirmed that.
The official ending of the X-Men movie saga is DOFP (2023).