Wasn't Team Plasma just a complete sham though? I mean, Ghetsis lied to them and N, for his own personal gain. I suppose Ghetsis didn't really reveal his plans to anyone but whoever was in that room, and the only other Team Plasma member was N. But idk, if Ghetsis doesn't have anything to do with this team I don't think they will have anything to do with Plasma, mainly due to the fact that Plasma was a complete sham, and they'd just be going in the Team Rocket rebuilding route. These guys don't really seem like they fit in the with Kyurem storyline though.
I'd quite like for them to just be some sort of side story, and then to see the real villains pop out, which doesn't necessarily have to be a team. Do you think that Professor might have any relation to N, or Ghetsis? Maybe not, just due to him not having Green hair. Though that book he was holding in that intro video kind of reminded me of N and that Team Plasma heritage idk.
Expanding a little on that last point. I think think Team Plasma was just one small thing in something big. I mean, we had Ghetsis, N, Concordia and Anthea and the Sages, which all quite looked as if they had their own society, and history, I mean, they had their own little ceremony for the crowning of N. I think the professor could come from that background, he certainly looks like he'd fit in.