Oh, please. I can think of a heck of a lot of good ways to bring Jar Jar back.
Just imagine how audiences would cheer for a scene with his head mounted above the fireplace in the Sith Inquisitors’ HQ. For instance.
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Heck, you could even animatronic it like with that Billy Bass fish. Have the mounted head sing the Banana Boat song, Dont Worry Be Happy or some Bob Marley or something.
I imagine a scene with Jar Jar and an IT-O interrogator droid would go over well too :)