There have been rumors of a Secret or New Warriors with Speedball coming on board with Mockingbird, bringing Deathlok back, and having introduced Quake.

Honestly, I think the most obvious choice is that they are working for General Talbot.

Skrulls seems like too much for a universe that just introduced Kree, has remnants of HYDRA around, has Ultron and Civil War upcoming, and Thanos eventually.