As it turns out, Tom Hardy was already in mind to play Wolverine in another X-Men movie when Matthew Vaughn was working on his follow-up to X-Men: First Class.
Much in the way that Patrick Stewart and James McAvoy’s versions of Charles Xavier were able to come face-to-face in X-Men: Days of Future Past, this could have happened with Hugh Jackman’s Wolverine and a young Wolverine, possibly played by Tom Hardy.
That said, it’s hard not to wonder what Vaughn’s version of a young Wolverine with an actor like Tom Hardy would have looked like.