ThunderCats - Season 3
If there had been a Season 3 of the 80's ThunderCats animated series this is what I envision it would be like...
Season 3 would take place mostly in space and would be about finding Thunderian refugees. The ThunderCats would be traveling between 3rd Earth, New Thundera and bunch of new planets. They would introduce four new ThunderCat characters that would go on missions to different worlds to find refugees. Mumm-Ra would enlist the help of some new Space Pirates characters to stop them.
Click to read their bios:
Click to see what they would like as action figures in the ThunderCats Classics line: