Both Jeff Goldblum and Benicio del Toro contend that their characters are still alive in the MCU, and in lieu of his own full movie, I would love to see Marvel bring back the One-Shots and perhaps do a short film with the Grandmaster and the Collector just to see how these two mischief-makers interact.
Either way, Jeff Goldblum sounds totally on board to return.
I don’t know if Marvel has room on its slate for a Grandmaster movie, but if the MCU continues to expand out into the cosmic elements, as I imagine it might, that provides more opportunities for the Grandmaster to show up again.
That would probably happen in Guardians of the Galaxy Vol. 3 or some other hero’s cosmic outing, but with Phase 4 almost a complete mystery, you can’t rule out a Grandmaster movie.