I got very strong vibes that modern elves wouldn't be immune to whatever genocide Solas has planned - he and Abelas' interactions with a Dalish Inquisitor lampshade it so hard.
I hope that the Dalish are going to become much more important in the next game. We know from Fenris that the clans will be having an annual meeting soon, and certain choices can lead to not only a Dalish elf being the leader of one of the strongest military forces in the world, but their clan and keeper having joint rule of a human city - something that is a pretty big deal in a world where, even with the Inquisition's backing, an elf like Briala can't rule openly.
Infact I'm calling it: Dalish vs City Elves.
It would explain why there was no option for a city elf Inky. We know the Dalish look down on flat-ears, and they're treated like trash by everyone else. They're already using the eluvians as an elven underground, which Solas took control of. The Dread Wolf was a rebel figure and took the underclass elves of his time into his care, it would fit perfectly - only this time he's freeing slaves to use as patsies and cannon fodder instead.
The Dalish, on the other hand, hate and fear Fan'Harel, and when/if the truth outs that he was responsible for the decline of their civilisation I can't see them allying with him. Solas' revelations don't even full disprove their beliefs, imo, they have the gist of it right.
Not to mention there's still the issue of the MIA Flem/Mythal. We know that either Morrigan or the Inquisitor are in servitude to her, and Flemeth was pretty implicit in wanting to transfer her 'gift' of posession to her daughter. We still don't know if Flemythal's on board with Solas' plans; the wisp/soul whatever of the Dalish's Mother Godess coming out in opposition of their equivalent of the Devil would be a pretty big deal.
And finally, I'm going into pure tintoil territory here, but it's been speculated that Flemeth, Mythal and Andraste are all related and might possibly be the same person, or incarnations of them. Andraste was able to win the trust of the Elven slaves and promised them their own land. With the next game moving into Tevinter, could there possibly be an Andraste/Shartan duo 2.0? (I'd literally prostate at Bioware's feet for the rest of my life if the PC of the next game can be an elven slave and partner up with a Mythal-indentured pro-chantry Herald in DA4.)
Honestly, I think I'm just going to be disappointed as hell if the Dalish end up as the bad guys in DA4. I wouldn't mind the option to wipe out a clan or two, just for continuity, but seeing my favourite faction get pooped on again would make me sad.