This does look freaking epic. I'm not a huge fighting game fan, but my love of Persona more than makes up for it. Plus, it's really pretty, which just makes it that much better. I think I read on the (badly translated by Google) Famitsu page that it takes place two months after P4, with Teddie hosting some sort of fighting competition. And yes,
>>5, that is Aigis. It apparently is going to have P3 characters as well, but Aigis is the only one that has been revealed.