I'd get the latest expansion pack "The Last Laugh" if you really want to try one out.
You get access to a new weapon, shield, and you get a ton of extra superheros for PvP maps.
The other expansion packs that cost money, are, "Lightning Strikes" (access to lighting super power) and "Battle for Earth" (access to earth super power).
"Fight For The Light" is a free DLC that gives you access to the Green Lantern powers.
Thanks for the info. I'm still downloading as we speak. The game itself downloaded fast, but the updates or whatever are taking forever.
