Jon Favreau posted a new photo on instagram today now that The Mandalorian panel has been announced for Celebreation. Take a look.
The photo certainly gives the impression that Taika Waititi, who is directing an episode of the show will also be providing the voice of IG-88. It doesn’t exactly spell it out for us, but I’m guessing that’s the case.
When the show first entered production there were some rumors that Waititi would also have a role in the series, and it appears to have been confirmed with this post. As far as I know we haven’t heard IG-88 speak in the current canon, so it looks like Taika will be providing the voice from now on. IG-88 is pretty much the only previously existing character that we know will have a role in the show.
Waititi provided the voice and did mo-cap for Korg in his movie Thor: Ragnarok in 2017, the character was well received.