Who knows, maybe Frank Oz could somehow participate in the next Star Wars movies Rian Johnson is working on.
Until now, his participation in the franchise has been limited to voicing and/or puppeteering Yoda, but like the trilogy that Game of Thrones showrunners David Benioff and D.B. Weiss are involved with, Johnson’s Star Wars movies aren’t connected to the Skywalker Saga.
So unless they’re set in the past and there’s a chance we could see a young Yoda, this could be an opportunity for Oz to portray another Star Wars character, be it a human or an alien.