Each week Avalon Games offer a new issue of Heroes Weekly.
Packed full of great super hero fun, each issue will offer either a short adventure, an NPC or some game mechanics for the Heroes Wear Mask system. While compatible with the HWM system, you can of course use the information presented in each issue for other super hero games, just monkey around with the stats and mechanics to fit the system you are using.
Need a really bad guy, well the Arch Foe advance class can fit the bill. Included are several new street level battle tiles to fight your new arch foes on.