We've already seen the Dwemer spectres haunting the ruins of Vvardenfell, and, even more, we've seen a living Dwemer, Yagrum Bagarn.
I'd be okay with maybe one or two more exceptions where we get the chance to talk to or see a Dwemer or two, but that's as far as I'll go. As far as a full-on return, no, absolutely not. As a playable race, it would be a complete disgrace to the lore. One of these days I need to actually make that big topic about why it's a terrible idea to make the Dwemer return...