Don't think he can get in shape for Conan anymore.
Stumbling Man: The Return of Whitman, Price, and Haddad
Looking good with a shirt on is one thing but looking large and lean as Conan needs to be is another. Personally find it hard he would be able to do both with his health issues and needs to come close to a Conan physique as possible or people would be disappointed comparing old to new.Unless of course this is one of those "son of..." Movies which then it will stink and not worth making anyway