As long as Indy doesn't say "Yippee!"

Vanity Fair has an interview with George Lucas. He has this to say on Indiana Jones 4, “The fans are all upset. They’re always going to be upset. ‘Why did he do it like this? And why didn’t he do it like this?’ They write their own movie, and then, if you don’t do their movie, they get upset about it. So you just have to stand by for the bricks and the custard pies, because they’re going to come flying your way.” Read more here.