The famous friends are supposedly planning to remake Butch Cassidy and the Sundance Kid. According to OK Magazine:

The actors will take on the roles made famous by PAUL NEWMAN and ROBERT REDFORD in the 1969 classic.

Damon will reportedly play the Sundance Kid, while Affleck will recreate Newman's role as Butch Cassidy, according to America's OK! magazine.

They may laugh this one off, but I bet some Hollywood big wigs think this might actually work. And there is a whole generation who has not seen the original classic. Besides, remakes are popular these days. I can see it now.