Edit: Am I seriously the only one in this room who answered this question? Its kinda an easy one.
I have seen several people plainly state the correct answer. no.
Asking this is like like asking if the next FF game will be the last one. It will never stop, even if they go every providence then they'll just make one will all of Tamriel in one game, how epic will that be?
or in the unlikely event, unless some huge economic or corporate thing happens, that bgs falls under. but they won't stop making them for lack of sales, each title sells more than the last. there is a demand for the games and the devs probably don't mind the millions of dollars.