Christopher Reeve is easily the best version of Superman to ever grace the big screen. He was one of a kind, and I don't think we'll ever see the magic that he brought to that character ever again.
Anyway, I've got a cool fan-made CG animated video here for you to check out that gives us a look at what Christopher Reeve would look like in action wearing Henry Cavill's suit from Man of Steel. The video was created by Mike Habjan, who says:
A while back I modeled a suit based on the Man of Steel movie and thought it would be interesting to see how Christopher Reeve would look in the suit. Here are a few shots from Superman vs Hulk Part 4 with that suit. I had thought of rendering out all of Part 4 with this suit, and maybe an alternate Hulk version, maybe Avengers style Hulk.. but it would take a few months to render it all out again and I just don't think I feel like doing it so here are just some of it.
This was just for fun. I may do more renders but not planning on changing the costume from the classic Reeve costume for future Superman vs Hulk videos.