Cal, Aster and Taka are already redeemed in my eyes, so I'll skip them.
ZEL - No, but it really depends if Zero can keep going after being separated from Lumi and Eve. Taka said ZEL was suppose to be keeping tabs on him and after what happened in the Reshiram path...Yeah, he either went insane or moved on but now has to deal with an angry Solaris.
Sirius - lol no, I will just be surprised if he gets any redeeming qualities going forward.
Solaris - Yeah, I have hope for him. Taka may be bias because he's his father and all, but I believed him when he said his father isn't all that bad.
Afterall, all of Meteor's extreme methods to drive the people out of Reborn city didn't occur until Lin took control.
Lin and Terra - Anything is possible when it comes to these two, literally.
Dr. Sigmund - Maybe, but he needs a HUGE reality check first, and even then I don't think Saphira will ever let him walk on Reborn or whatever is left of it, ever.
Blake - Ehhh no, I'm fine with what ever is coming to him after what happened in Ametrine. I know he doesn't believe in any of Team Meteor's goals, but he'll never care about anything beyond his own self interests.
Fern - Yes. It would be such a waste if Fern never gets any of his issues even somewhat resolved. I at least expect an encore of what happened at fiore mansion, but with an actual talk between him and Florinia.
El - Not sure, he's wild card.
Bennet - Yes. He's not evil just really misguided. Serra is also on her way to slap some sense back into him so there's that.