So, it's confirmed. Captain America Civil War is coming to theatres next year, but the question remains, how will it be done? so here is a suggestion:
USE ULTRON RATHER THAN NITRO AND THE NEW WARRIORS!
Ok, here's how it works, basically Ultron's actions give the same effect to the government as Nitro, and the government passes the registration act over such not just for Identities, but for FULL Surveillance. Tony, realizing the damage of Ultron, joins the Government. Captain America sees it as a violation of Human Rights, and fights against it. If Spidey is to join, he gets his comic roles. If Black Panther takes his place ;-( then... he'll do Spidey's stuff. After the act is passed, Captain America escapes, and falcon shortly follows, other heroes soon join and the sides are chosen. The first battle then begins... and then, well... thats my beginning.