I think we should discuss a little about the story and the characters.
Since we start from scratch, I think we should outline the status quo of the new Universe. I mean, it's a place where supeheroes exists and we merely band them up for the first time, or it's a place that so far has never seen (yet) superheroes?
Are there metahuman, mutant or old fashoned people that get powers the most different ways?
It's a "generic" superhero universe where cohexist supermen, magic characters, alien demons angels mythological gods or it's something more... I don't know how to say it... strict... (i.e., there are no gods, or magic doesn't exist...)
I think we could talk a little about that, don't you think?
Or else, we could do like last time and start just with the story and see where we end up.
As for T5 idea, I think that could be simply the beginning of the alien story. I mean, if the aliens are secretly "taking over" the government, there should be one that knows and that enlist the heroes (or would be heroes) to help him. Or maybe it's the aliens that want to capture the ones with superpowers and they rebels, it could be handled in dozens of way, but I guess in any case we are going to have to see our characters in a "solo" before them joining up.
I also think that a "solo" little story for all of our characters to be posted in a secret files thread would be cool.