Sam Neill has been cast in Thor: Ragnarok.
Neill, known for Jusassic Park, stated in the following video he recently filmed his part for Thor 3.
"Oddly enough, I'm not really allowed to say this, and I can't tell you what it is... I did a couple of days on Thor, just before I came over here. I had to sign all sorts of things that say if I say anything else, Marvel's Secret Agents, and they are lethal, will come and get me, and probably my children as well."
Jeff Goldblum, who was also featured along with Sam Neill in Jurassic Park, is playing the role of the Grandmaster in Thor: Ragnarok. Perhaps Sam Neill is playing an Elder of the Universe as well?
Thor: Ragnarok is currently filming in Australia.
"Thor: Raganarok" has a November 3, 2017 release directed by Taika Waititi starring Chris Hemsworth as Thor, Mark Ruffalo as Hulk/Banner, Tom Hiddleston as Loki, Idris Elba as Heimdall, Cate Blanchett as Hela, Tessa Thompson as Valkyrie, Jeff Goldblum as Grandmaster and Anthony Hopkins as Odin.