If you're using c4d for the text I would suggest just doing it in ps with layer styles. The yellow on the middle supermans is overpowering try to overlay it onto a nice gradient so it blends better. Also try getting your hands on soem high qualtiy lens flares to use instead of those obscure...
I'm not going to drown you in artificial praise like your average joe. What you read might be construed as rude/harsh but I am by no means intending to degrade you or your work. I am simply trying to help you improve.
Difficult to really critique the first few works as most of it is just white...