A new feature in City of Heroes allows players to travel backwards in time. Not in real life, however, just in terms of their avatars. Also in teh free expansion: A weapon customization tool, two new power sets and enhancements to the inventions system.
The “flashback” ability will allow players of the MMO to "participate in exciting events from the history of Paragon City and the Rogue Isles. Heroes and villains can also use this feature to play or replay hundreds of missions from earlier in the game."
“Flashback” is an innovation that gives players the opportunity to participate in huge story-lines and opens up missions they enjoyed previously,” said Matt Miller, NCsoft’s lead designer for City of Heroes and City of Villains. “This gives the game greater depth and many more challenges.”