Eve Ewing confirmed she was doing "a new take on Champions" when Outlawed was announced - that title's definitely coming back.
A fifth team title possibility is Future Foundation, as when Whitley's series ended, they said there'd be big changes but they would be back (they did stop short of saying it'd be in their own book though, so it isn't confirmed). Outlawed and Empyre would both cause upheaval.
You're right about New Warriors. Thrasher did say in Incoming that he wanted to re-establish the team. Unfortunately for him, Nova turned him down - Richard's going to be busy in Guardians of the Galaxy. Nothing stopping Dwayne recruiting a new team though. Squirrel Girl is a highly likely candidate if it does come back since she does have history with Speedball. And of course, she was meant to be in that TV show that never got off the ground.
YA having an Empyre tie-in does make sense, and they did mention the YA's origin in the trailer. Agents of Atlas, yeah, it's been three minis up to now, including one starting this month. It would be nice to see them upgraded to ongoing, though it's not part of the Outlawed related speculation as the team's Asian HQ means they'll be unaffected by the events of Outlawed.