I wouldn't mind playing more games in The Forgotten line, but only if each "episode" feels like a complete adventure in and of itself. It's OK to allude to a larger story, of course, so long as the player doesn't feel cheated by what's withheld.
Even if it's possible to release all planned episodes, my interest wouldn't carry me through an entire serial game. Each installment would have to sell me on its own merit.
That said, best of luck in getting the project in motion again.