It's my frustrated noise. God, I never saw that movie, but you bring back memories of bad commercials.
Wa-kun, no, Haley's comet was never touched upon. I think the Perseid meteor shower might have been alluded to in the second movie with Princess Kaguya, but I don't think it was a direct reference. If you want something that doesn't happen every 76 years, that's an option. There's a lot of other things that are space related that you can use as an idea for a bad guy.
In addition to Eris, Celes, and Pluto, two other dwarf planets are Haumea and Makemake.
http://simple.wikipedia.org/wiki/Haumea_%28dwarf_planet%29http://simple.wikipedia.org/wiki/Makemake_%28dwarf_planet%29Makemake has a weirder, less threatening name, but it was named after the God of Easter Island's ancient civilization that eventually died out via cannibalism.