There is an short movie here: https://www.nukhu.com/otis/ but with a twist: there are three character perspectives/narratives and you can switch the perspective of one of three people on the fly with the A, S, and D keys. I think this would make a great experiment for Rifftrax by splitting Mike, Kevin and Bill into the three character perspectives to riff each accordingly, maybe via a plug-in or a deal with the owner of the movie(s) (BTW, I spoke to the director/manager of the movie and he's really keen on the idea of Rifftrax riffing on them).

The movie is not bad, but it's quite riffable: there are long, empty spaces where there is no dialogue in all three perspectives, and the movie(s) is not a comedy, so I would love to hear Mike, Kevin, and Bill riff each channel apiece and switch channels (and riffing commentary) on the fly!