During Avengers: Infinity War, it was mentioned that Scott made a deal with the U.S. government to be placed under house arrest rather than be returned to The Raft.
It’s now confirmed that Ant-Man and the Wasp is set post-Civil War and pre-Infinity War, and will see Scott trying to balance his home life and his Ant-Man duties.
But that becomes more complicated when Hank Pym and Hope van Dyne recruit him for a new mission.
Evangeline Lilly has said that the Quantum Realm, where Michelle Pfeiffer’s Janet van Dyne is still imprisoned, will play heavily into Ant-Man and the Wasp, so perhaps this story ends with Scott and Hope being trapped in that alternate dimension, and they’ll finally break free by the time Avengers 4 rolls around.