Yeah,I kinda think they will be back.These guys and gals were smart.So they did what they had to do I have said it before and I'll say it again I don't think we've seen the last of these critters.
We already had a game about the Dwemer. Two, if you consider Redguard's sideplot. Which also makes two games featuring the two only known locations of Dwemer settlement; Hammerfall and Morrowind. The day they're brought back from the beyond won't be a time to rejoice. It would be a greedy attempt to appeal to the memory of beloved but dead issues.
Besides, we still have the Falmer, we've barely scratched the surface of the Ayleids, Altmer and Bosmer history is sketchy at best and Argonians are living mysteries, forget the missing ones.
Their return is especially unlikely if the widely believed idea that they became the skin of the Numidium is true. And seeing as it's the one idea that's thematically consistent with the lore (i.e, the nature of the endeavour, overcoming dualities, the architecture of towers) I see no reason not to disbelieve it.