Robert Downey Jr. dishes on the end of Iron Man and leaving the door open for more

All things end, but when it comes to Iron Man in the Marvel Cinematic Universe, it's extra hard to let go. 

Robert Downey Jr. visited Today on Wednesday to talk about his upcoming turn in Dolittle, and host Hoda Kotb had to ask — is he sad about Iron Man's end?

“Now that I’m middle-aged, to be honest, you start...