Obviously he doesn't have to. However if people didn't pay to see his acting talent, he'd be nothing. Yes I know they didn't pay to see just him, but he plays a big part in the movies he's been in. I saw RM, because of him. His acting talent, mixed in with a decent story line, was the reason I watched RM. I think he owes it to those that have spent their money to see him. So, again, he doesn't have to, he doesn't "owe it to us." But where we are the ones that fuel his bank account, I think it would be at least courteous to those that put money in his bank account to explain why he has done something that is a complete 180 from the previous projects he's done. That'd be like your CEO asking everyone to buy a product from the competition, you'd definitely want an explanation.