When you play as a character, you unlock icons and backgrounds for them. Yet, we still have ones for Resistance even though there's no Resistance characters.
If all characters get the same treatment, that'll mean that the dlc ones will get icons and backrounds too. I don't think we'll get a Resistance one because we already have Resistance stuff. They wont double the icons and backgrounds for Resistance.
We already know Ico and Wander aren't possible. So, neither of those two would even be educated guesses.
Aren't possible? No. Aren't likely? Sure. Ico and Hale are just two of my 5 or so most wanted characters.
Fresh to death