While using RPOL for running my Hideouts & Hoodlums campaign, I've
been checking out other campaigns there and have not found too many
still active campaigns to my liking. One is "Marvel Generations",
which is set in the future instead of the past, but, like Superland,
is about time passing and a new generation taking over for older heroes.

http://www.rpol.net/game.cgi?gi=31232&date=1233095773

~Scott