"By design, the Marvel universe on film is bigger than any one actor. I truly believe that as good as they are, Chris Hemsworth or Chris Evans could bow out of their respective franchises and you could still get more CAPTAIN AMERICA or THOR movies. In fact, a change seems inevitable at some point. But I truly think Downey Jr is the only guy that could ever play Tony Stark. He’s the anchor for the entire Universe, bringing a cheeky charisma to the films that’s tough to replicate (although Chris Pratt has a lot of potential on that score) and I couldn’t imagine an AVENGERS movie without him.
Arguably, he made the Marvel films what they are today, with him injecting so much of his own personality into Stark that the movies played to a wider-audience than they would have otherwise. He brought in a whole new group on moviegoers (specifically non comic-book fans) that ended up sticking with the various franchises well beyond THE AVENGERS to the point that the Marvel audience is arguably the broadest of any franchise going today, which is why all the films are so huge. Kids, teens, young adults, parents, these days everyone seems into Marvel and that simply would never have happened without Downey Jr’s big-time charisma and tireless promotion of even the Marvel films he’s not involved in.”
[…] Time is luck. So don’t waste it living someone else’s life, make yours count for something. Fight for what matters to you, no matter what. Because even if you fall short, what better way is there to live? It’s easy feel hopeful on a beautiful day like today. But there will be dark days ahead of us too. There will be days where you feel all alone, and that’s when hope is needed most. No matter how buried it gets, or how lost you feel, you must promise me that you will hold on to hope. Keep it alive. We have to be greater than what we suffer. My wish for you is to become hope. People need that. And even if we fail, what better way is there to live?