Fast forward 10 years into the future of the ThunderCats! Lion-O is an aged king, ready to choose a successor now that his land is prosperous and at peace. But when that Utopia is shattered by the Dogs of War, a savage race of canines hellbent on domination, he's forced to go to a most unexpected source for help: Mumm-Ra!
— Description from Comic Vine community (comicvine.gamespot.com).
