“Literature”, in this case, means anything with a plot. So you can post your favorite cheesy B-movie ending, if you think it’s sufficiently awesome.
My favorite villianous fate happens to Dios the high priest in Terry Pratchett’s Pyramids.
(I gather from the old Discworld book club threads that not all of you like Pyramids as much as I do. There were a lot of unfavorable comparisons to Vorbis in Small Gods. For the record, I find Dios creepier).
It just fits so perfectly. Dios spends all his life trying to stop-up time, to make Djelibeybi live its past over and over again. And so… he ends up in a time loop, doomed to relive his life over and over again. I’d even hazard a guess that it’s only a punishment from the reader’s point of view; Dios, had he remembered his past life, would probably think it was quite fitting. His fate is almost an extension of his personality.