“X-Men” is back in the cultural zeitgeist thanks to Marvel Animation’s hit animated series “X-Men ’97,” and while it’s a different beast, it is paving the way for some of the first significant mutants to join the MCU this summer in “Deadpool & Wolverine.” We already know that star/producer Ryan Reynolds offered filmmaker Shawn Levy the “Deadpool 3” gig during the filming of “The Adam Project” (they also worked together on “Free Guy”).