So we know about
1. The Collector - Del Toro
2. The Grandmaster - Goldblum, and
3. Ego (does he count?) - Russell
But what about!!!
4. Sam Neil? He has to be an Elder right? He fits the same aging former action type of guy as Del Toro, Goldbum, and Russell. I've read he might be the Trader in Thor Ragnorak, which may make a lot of sense.
5. Sylvester Stallone? Who knows. He's been rumored to be anything from a Ravager, to a Nova member, to an Elder, to the Living Tribunal. I have no idea. But he could easily fit the Obliterator role as an Elder, perhaps the Champion, and that makes 5.
6. Micheal Rosenbaum? He's a bit younger than some of the others, but supposedly fits with Stallone's character in Guardians 2. So again who knows, he could be another face on the Tribunal, but he could also be tending to Ego's planet surface and maybe even helped created his body or even Mantis if he's somebody like The Gardener.
7. Sharon Stone? I know she's been rumored to be Janet Van Dyne, and honestly that makes a lot of sense, but there is some speculation that might also be an Elder, and you can't put it completely off the table that she could turn out to be Caregiver or one of the others.
What are your thoughts on these, and do you see any more Elders joining the cast?