Before seeing KOTCS, I was apathetic towards the Mutt character. I always suspected he was Indy's son, even before the movie opened. After Lucas's ludicrous notion to make Mutt the lead for IJ5, and Indy be the tagalong, I really started hating Mutt, probably not justifiably (but I also hadn't yet seen the movie). Having now seen the movie, Mutt is alright, he did do most of the action in the jungle chase, but that was fine. But overall, he's not that interesting, and although I'm fine with Shia, he doesn't make me care about the character any more, and it would be a huge mistake to switch roles for IJ.5. Actually, I think KOTCS would be a fine end to the series, although I am convinced that Ford could do another film, b/c he was awesome in KOTCS. I know Lucas has a penchant for doing whatever he wants, and telling the fans to stick it, but I think Speilberg is a little smarter, and has reacted better to fans' reactions in the past than Lucas. So overall, I think if they do a 5th film, if it's got INDIANA JONES on the marquee, Mutt should NOT be the lead.