do you think there will be any best actor/actress supporting nominees?

Yes, I think it will get 3 acting nominations. Best actor (Cillian Murphy), supporting actor (Robert Downey, Jr.), and supporting actress (Emily Blunt).

Murphy and Downey Jr definitely and maybe even Josh Hartnett could get a surprise nod for “supporting actor”

If they had best cameo at the Oscar’s then Casey Affleck would be my pick