User blog comment:AdventuringStar/The Lich's next plan?/@comment-26349751-20140501080213

Slightly similar to mine:

Something else that's evil (a creation of the lich), returned too Ooo, attacked TT and Pig, brought back the Lich to its old form. Raise an army, and will attack Finn and Jake. Then the two heroes will fight fire with fire by making their own army from everybody in Ooo, the Nightosphere, Lumpy Space, Mars, all Death Worlds and everything you can imagine.

The two armies collide, and once again the ftae of all existence of life is at stake. The ending I haven't thought of yet, but of course F and J will win, but I'll add plot wist.