I was checking all the coverage of Comic Con. I was there, but couldn't make every event. Paramount was covering Indiana Jones and Star Trek at the same time as SideShow, so I went to Paramount's presentation.
Anyway, on Rebelscum, I found their coverage of SideShow and it said there were indications of a Palpatine 2-pack with Darth Sidious and The Emperor.
I don't know for sure how it could look, but the coolest possibility would be:
Supreme Chancellor in red from the Mace Windu duel in ROTS
Emperor Palpatine from his "formation of the first Galactic Empire" speech in ROTS
We have Hasbro's ROTJ version, and the ROTS Yoda duel version. I'd love something different. The outfit from the fight with Mace is on my want-list for sure. However, they could repack the hologram from the Mechnochair as well I suppose.