Prophetsteve wrote:AvX (would bring the stats up to current levels)
The problem is, as soon as the AvX would be published, the stats wouldn't be at their current levels.
That's why the choice of using 'event-based' characters, instead of generic or most recent characters, make sense.
For the new events, one should be careful about not picking good or important stories. But stories which will make a good game, which is very different.
Civil War is great because chosing side and dealing with the opposing side give a lot of opportunities to the player to make choice.
Annihilation... I guess it can bring a lot of travels and some diplomacy (and ass-kicking) to oppose the annihilation wave (you don't really have choices to make, I can't see PC siding with Annihilus)
Secret invasion could work if you can build up the paranoia and the investigation.
But not every event can work well.