I happened to catch a bit of one of the old ones the other day... he looked so young! I'm not sure whether this will work or not - on the one hand, he might be too past it, on the other he still looks distinctively like Indiana Jones. Depends on how they do it I guess.
I think the guys can make the age thing work. (ie Sir Sean Connery, Mr Steven Siegel etc) Sharon Stone????!!! Hey I thought she looked fab in basic 2 and I also think most men would agree, but the women they just lets say didn't agree.
George Lucas, Steven Spielberg and Harrison Ford...man can't get bigger than this trio...'cept maybe if you threw in Tom Hanks as an Exec. Producer and WETA to do CG