The only man able to take the throne after Hugh Jackman. We believe that if Wolverine is to make an appearance in the Marvel Cinematic Universe that the only man able to pull it off is Danny DeVito.
A couple good reasons as to why I believe so strongly that he suits the character:
Danny DeVito's height is a lot closer to the comic books portrayal of Wolverine. With Danny being 4'10" and Wolverine 5'3".
Secondly, we all saw Danny's portrayal of the Trashman. So, we know he is fully capable of fighting, and that he is not afraid when things get dirty!