Re: Plot ideas based on SPOILERS (general discussion)
I do think we will see a lot of Thor's rogue gallery, but most cameos. Especially since it was said a few days ago that the movie will be filled with Thor mythos. Karnilla appearing may be a possibility, but anyone outside of Malekith, and Kurse, POSSIBLY hela, would most likely be brief scenes, or cameos.
Which I think would be great. Cause even if he doesn't have anything to do with them, it lets us know that they DO exist in the MCU
"Brushes? Nah. Hit 'em as hard as you can." -John Henry Bonham