4. Adam West
If Robert Downey, Jr. is the most popular current superhero actor, then it makes sense to also have on the oldest living superhero actor: Adam West. The star of the infamous 1960s Batman TV series, West was also the first person to portray Batman in a feature length movie. The man is, quite frankly, a legend. Make all the dark, gritty Batman movies that you want, people are always going to remember West's campy Batman portrayal, complete with groovy dancing, scaling buildings with the Bat-rope, and Bat-shark repellant. West was alluded to in a previous episode when the guys followed someone they thought was West to a garage sale, where they found a box that had a prop ring from The Lord of the Rings. Turns out it wasn't West, but that just means he can appear for real now. I see him appearing at the comic book store for a signing, similar to what Stan Lee did, although this time we would actually see the person at the store. For bonus points, let's see if West can bring Burt Ward along to drop a couple "Holy ______" lines.