Indiana Jones 4

That would be cool

This seems to be fairly old news.

Quite a few people are rumored to be involved apparently.  Natalie Portman, Sean Connery
(though I somewhat doubt it considering he’s said that he’ll be quit acting after he receives
his Lifetime Achievment Award at AFI) and Karen Allen. 

And from the news articles on IMDB it implies that Harrison Ford is definatly attached to this