Reiss still loves Batman! At 4.5 Batman is still his favourite super hero. Anything from cartoon Batman, original Batman & Robin (with Adam West) to the early 90's Batman movies. He would like to watch the new Batman movies when he is bigger as they are too scary for him now.
He does like Iron Man, Superman and Spiderman but Batman is the one.
Reiss has recently discovered a love for lego - so he does have some superhero lego, with more to come I am sure.