I saw in a closed thread someone needing to reference a post made in the old forums. If you need to get to them they are here
http://community.wonderhill.com/forums/forumdisplay.php?1239-Marvel-Contest-of-Champions. Unfortunately the search function on the old forum is pretty much useless now and Google hasn't indexed the new site as of the time of this post.
If you try to go to the old forum using a Kabam.com link, you'll be redirected to the new forum.