"Will Robert Downey, Jr. star in 'Iron Man 4?'" has been a very hot question over the past few weeks. Robert Downey, Jr. and his co-stars have been asked ad nauseum about the potential for another sequel and they've all had varying reactions. But here's a more realistic question: What if it doesn't matter if Robert Downey, Jr. will return for 'Iron Man 4? Marvel, it seems, is already planning for life without their biggest star.