City of Heroes Mission Architect feature is an issue away, and there's already an issue in testing in Closed Beta, but that doesn't mean the players aren't eager for information. At HeroCon, which recently took place in Santa Clara, California, several of the CoX developers held a panel discussion on the Mission Architect. Fortunately for everyone who couldn't make it, forum poster Quilcene was present and taking notes.
You can instantly see where the additional development time is going. Players will now be able to 'customize enemies, rescuees, allies and contacts in what they are calling the Critter Creator.' In other words, yes, players will be able to put their own heroes (and villains) in the missions. Another key fact is how the rewards will work: there will be no mission complete XP and nothing in a player-generated mission will count towards badges, and instead of regular drops players will earn 'skeeball tickets', which will apparently work similarly to the Merit system.