I was hoping for Eskel or Letho to be honest. Ciri is a safe choice but a bit on the boring side. Eskel would have been a lot more multi-layered protagonist and dialogues would have been funnier.
I was praying for Letho even though we all knew it was going to be Ciri (for better or worse, we'll see).
Leaning into the moral grey of the Witcher world with Letho would have been awesome, he says (in one of the endings to his story) he'll head out east over the mountains so we could have gotten some all-new environments and it would have been 100% CDPR IP so they could have done whatever they wanted without trampling over lore too much. Plus Letho is just an amazing character with huge protagonist energy. Oh well.