He passed away at the end of Return of the Jedi so it would only make sense for him to be a Force ghost in Star Wars: The Last Jedi. For all we know maybe Yoda [will also] appear [in] the form of a flashback.”
And the guy waxes poetically about his thoughts on why Yoda is not a Force Ghost in The Last Jedi, and as we discussed, the only logical conclusion is that he’s seen in a Flashback.
For a long while now, we’ve heard that Yoda returns in Star Wars: The Last Jedi. There were rampant rumors that Frank Oz was spotted on the Ahch-To set of this sequel, that he’s done a voice over while others controlled a practically puppet as opposed to CGI.
While Yoda more than likely makes his long-awaited return in The Last Jedi, with a Forceback a pretty safe bet, it’s also probable that a Force Ghost Yoda just looked dumb, and didn’t fit the toy being sold.