Top 10 End Show Scenarios if the bad guys actually wiped out the Thundercats for good. 

Special Mentions: 

Well, we all know, Slithe would just go back and live in a pond... Mumm-Ra would refernish his tomb.... Monkian would join a 12-step program, maybe get some self esteem.... as for Jackalman and Vultureman, well, they'd be doing TV movies on fox because those two kids are crazy! Never know what they'll do next. (SmashP3) 

The mutants blow up the Lair in the same manner as their Castle had been blown up in the past. (MC68040) 

They TP the Lair and Tower. (MC68040) 

They starts high-fiving each other so much their hands ended up in cast. (MC68040) 

The order pizza and a keg of Berbiljuice to celebrate their rare victory. (MC68040) 

::They have a fight on whether to rename the show "Lunatacks", "Mutants", or "The Mumm-ra Show":: (Gatotrueno) 

Luna ends up sitting on the couch of Cat's Lair all day watching soaps such as "As The Third Earth Turns" and eating bonbons (Cheeezey)
 
Mumm-Ra goes into the modelling business after talent recruiters in fashion magazines see how good he looks in a skirt (Cheeezey)
 
They'd have a good laugh, then look around at each other, trying to think of something to fill that empty void in their hearts... (the_snarf) 

Mumm-Ra turns down being on the new HollyWood Squares, as he wanted the center square. (the_snarf) 

Ma-Mutt loses his sex appeal. (the_snarf) 

They all live happily ever after, that is until the ghosts of the ThunderCats return, kinda like Grune, and wreak their revenge. (the_snarf)
 
the thundercats could be captured and made to be mummra's love slaves that would sure kill me (Dham294120) 

      RANKDa Top Ten FROM:
10. Mumrah Makes a giant turd that fall on them killing them all.  The 
End (JonDensmor)
9. At first, all the villians would rejoice... until they realized that all the easy women and men (e.g. Cheetara and Lion-O) were gone, and then they'd be pissed because they wouldn't be able to get laid (Cheeezey)
8. Monkian keeps on asking Jackalman "Hoo, hoo, what do you want to do?" and Jackalman keeps on replying, "Nyah, I don't know, what do you want to do?" 
Until the scene fades out:: (Gatotrueno)
7. They play a round of dart, using Lion-O's butt as the dart board. (MC68040)
6. Begin a new tv show about what happens when a mutant, a lunattack, a 
decayed demon priest, and John Popper share one appartment, and the 
hilarity that is to be their lives... (the_snarf)
5. They begin fighting Gary Coleman... (the_snarf)
4. "Let's bring out the babes,wait,there isn't any female 
mutants." (ped@iclub.org)
3. They moon Thundercats and taunt Thundercats to kick their butt. (MC68040)
2. Ma-Mutt would lift his leg and "christen" the lair and Tower of Omens in the name of evil (Cheeezey)
1. ::Mumm-ra:: "Like my Lion fur coat?" Mwhahahahah!!!!! (Gatotrueno)