Maybe as they're killing the original game, servers don't work hardly anymore and EA (as many think) are letting it get to a point where its going to be closed, then they can say 'hey guys, its fine, the next battlefield is a full remake of ALL the maps'.
Of course, they'll release a base game and instead of the dlc's, they'll release one map every few months, and bring in all sorts of camos and what not that we can pay for or grind for 20,000 hours.
And then they'll say its a homage to the battlefield fans, from the start.
Or they could just remake Battlefield 2, as hardly anyone has played that, and the maps were great.