My first thought were the same as Talismanisland. I think that the new game will be a Terrinoth LCG. I don't know if cooperative but I cuonting on a card game.
But the real thing for me would be a Terrinoth RPG or a Terrinoth skirmish game.
Terrinoth RPG could be published the same way as WFRP 3ed is or the way DH is. But still after a lot of waiting an RPG set in this world would be a hamer for all the fans of the setting out there. And If i remember correctly there were some question about the possibility of making such a game at the forum but there was no official anwser.
Terrinoth skirmish would also be a amazing choice. We have so many figures by now so the heroes or monsters would not be a problem. Ther could be many fraction and the game could be published like Dust Tactics. So the core set would come in a big box with some plastic models, cards, tokens, rulebook, two-side game board, some dice and plastic enviroments. So it would be realy to play just out of the box. This would be a must have for me.
Can't wait to hear an official anwser and to see an announcement.
PS. they could do the same for an old forgotten setting like Midnight. But that's just my wish.