Nobody needs to 'take over'. If somebody wrote a film about a fifties motorbike kid who finds himself on an Indy style adventure I imagine it could be ok. But why does it have to be an Indiana Jones spin off? Why must eveything be franchised to within an inch of it's life? Alien is a case in point - great one-off sci-fi horror film. Then they made an action sequel which was very good. I even didn't mind Alien 3... then we got alien ressurection, AVP, etc etc... and now it's just a cheap joke.