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Time travel movies are always a little dicey. This one works but why did they not go further back in time to solve their problems. Why not go back to when Peter Dinklage was in college and frame him for cheating so he could not get a good job?
So the Wolverine goes back to 1972 when is it when he returns and awakens in the movie? 2022? But many of the “dead” Xmen are back alive! It is best not to dwell on all the anomalies.
Go, you will enjoy another entry from the Marvel universe.