New Brevoort Formspring

Tom that onslaught scene in uncanny avengers #4's end. can u tell me that whether it was an age of ultron tie-in scene or was that Remender's own future story arc tease? i know its spoilery but u can be as non spoilery as possible and plz give a little bit hint plz. coz in my mind there is a thought that that scene was set for AU tie-in plz tell me whether its another story or not ?? Regards