Frank Oz is the guy that does the voice of Yoda in Star Wars, and there are rumors that he's going to be back in the upcoming movie, The Last Jedi, after not appearing in neither The Force Awakens or Rogue One.
Frank isn't confirming that . . . but he also isn't denying it. In a new interview, he said:
I feel like I’m a prisoner at war here, and I can only give you my name, rank and serial number. To be true to the people who asked me, and they are kind of my family, I have to say I’ve been asked not to talk about it. I love Yoda. I would be happy to talk to you about it at the time they let me.
Of course, if he wasn't involved, Disney would have no control over what he said, right? So, it sounds like he's involved in SOMETHING in the pipeline. Maybe?