Remake Battlefield 4 (slightly reskinned) with the Fortification system from BF5... sell a hundred million copies easily.
Too bad all the original and even second generation DICE guys are long gone, fucked off to their own studios or unfortunately working on fucking Fortnite.
(Some are apparently busy messing up Arc Raiders also!)
No one at DICE even remembers BF2142, so I wouldn't hold your breath for a real sequel. They mention bringing back ship combat for BF7, which was the dumbest thing in multiple Battlefield games from 1942 onward. Any pub server, somebody always wrecked the ship, either intentionally or through incompetence. Usually immediately leading to a team loss.
Helicopter combat on pub servers just leads to ace pilots farming the other team, usually without any real counter. Hope they make the AA vehicles and man portable AA missiles good enough to shut helicopters down mostly.