SPOILER WARNING: The following article contains spoilers for “Logan,” in theaters now.
As those who have already seen "Logan" in the cinema already know, the film's final shot is of a Christian cross shifted over on one side to resemble the "X" shape of the Saltire, or St Andrew's cross.
The obvious reference here is to the X-Men themselves, but it seems the film's director, James Mangold, was also drawing inspiration from a particular "Uncanny X-Men" cover drawn by of Marc Silvestri.
Speaking about the shot and its inspiration on the Empire Online Podcast, Mangold said, “There’s a fabulous piece of artwork on the cover of an old 'X-Men' comic with Wolverine pinned almost like Christ to an X aboard a mound of green skulls. So I can’t take credit for conflating the crucifix and the cross. I’m a filmmaker, so I want it to not be words. You’re looking for this gesture to exit, and we’ve done enough words at this point, and that’s as much as I can tell you where it came from.”
The cover in question is from "Uncanny X-Men" #251, which does indeed feature Wolverine crucified on an X-shaped cross. Of course, the skulls are purple, not green, but Mangold didn't have the image in front of him, and green does feature pretty prominently elsewhere in the piece, as you can see here.
The issue in question also has a number of other parallels to "Logan" — its main villain is also Donald Pierce, backed again by a gang of cyborg soldiers, the Reavers. And just as Pierce in the film fires a harpoon into Logan, the Logan in the comics suffers similar injuries. However, that is pretty much where the direct similarities between that particular comic and the film end.
Now in theaters nationwide, “Logan” stars Hugh Jackman, Patrick Stewart, Boyd Holbrook, Richard E. Grant, Dafne Keen and Stephen Merchant.