But no timetable set yet. See link. That would be a potential game-changer as to conference alignment, as you have to figure that Denver and Air Force would join a conference for lacrosse with Utah.
Other than that, there are plenty of P5 programs rumored for possible upgrades, but nothing definite yet. The only confirmed new DI men's lacrosse program in the next few years is St. Bonaventure, which is due to begin play in 2019.