What other hosts did Dolores bring to the mainland?
Once again, a season of Westworld ended and we have very little idea what Dolores is doing. To recap: Dolores spends most of the season putting herself in a position to kill as many people as possible. She knows that Delos has the Forge and the Cradle, and that one backs up the park guests while the other, respectively, backs up hosts. Dolores takes out the Cradle, getting rid of the host backups, then uses her father’s control unit to try and delete the Forge. In the Forge, she "reads" actual humans, including -- very pointedly -- a Karl Strand book.
Strand is the head of the Delos response team that even seems to have power over Charlotte Hale (or the late Charlotte Hale, as we learned we’ve been watching). Presumably, her reading of Strand is what gave her whatever secret coordinates she beamed the Host Heaven to out of the Forge, because she claims no one will find them there.
After saving all the hosts that had passed through to the Valley Beyond, Dolores uses Charlotte Hale’s body to leave the island, even though Stubbs totally knows what’s going on. (Stubbs, apparently, came out of the Charlotte/Dolores Mesa showdown two weeks ago on Team Dolores, amazingly.) As she’s boating away from Westworld, she opens her bag to reveal five gray (non-human) pearls. One was Bernard. The other was whoever is in Hale’s body now. Who are the other three hosts she deemed worthy of saving? Maeve, Hector, and Armistice seem like good candidates as they’re hosts we like that died and haven’t been seen in the 11 Days Later timeline. Also high on the list would be Angela and Clementine -- two Dolores/Wyatt devotees who did not make it to digital heaven in "The Valley Beyond."
Will we see more of Virtual Eden?
If we had to guess right now, the next season of Westworld won’t mess with going into the untouched digital heaven, aka Virtual Eden, aka the Forge, wherever that's been beamed. Every host who made it into the host afterlife has completed their plot. Maeve’s daughter is safe, awake, and with a version of her mother. Teddy finally got to see the beauty in some world without seeing the ugliness. Akecheta’s wife is there (which makes little sense as she’s in cold storage, but whatever)! No need to get all mucked up in digital heaven shenanigans. Unless all that data is taking up an obscene amount of memory, it can continue to go unnoticed and remain a promised land as Dolores drags the real world to hell.
And that’s where we are, viewers. Hell. We, the real humans of real life, have been told that we cannot change our fate, we are not the drivers of our lives, we’re "The Passenger," the title of the finale. We’re all Old William who has one bad day in the park, then forces himself to re-live it over and over again in death trying to change a decision all current technology tells him he can’t. He has become Sisyphus, spiting the gods, doomed to his own hell.