I know there's been much debate as to whether there will be an Indy V and whether Mutt will be back---will he be the lead etc. Yes, I read Lucas' comments about the future of the character and the franchise. But, I had (at least to me) an interesting thought. I wonder about the the possibility of Indy V as a prequel to Crystal Skull as Temple was to Raiders (so only a year prior). In such a scenario there would be no Mutt and Indy wouldn't be "tied down" as it were by being married and a father. For those who don't like the idea of Indy progressing to the 60's, this would also keep him the 50's.
Russians could still be Indy's nemesis, though like Temple, it could be someone else. I didn't exactly have a plot idea or anything, just a way to avoid some of the parts of Crystal Skull that would otherwise be unavoidable (yes, I'm sure you could explain away things...Mutt's off at school etc., but this is just what came to mind as an alternative).
Russians could still be Indy's nemesis, though like Temple, it could be someone else. I didn't exactly have a plot idea or anything, just a way to avoid some of the parts of Crystal Skull that would otherwise be unavoidable (yes, I'm sure you could explain away things...Mutt's off at school etc., but this is just what came to mind as an alternative).