Board Thread:General Discussion/@comment-11469381-20140205025250/@comment-25100945-20140702031428

Well their alliance with Shredder is the closest they can get to the Turtles and April. The Turtles are the only force strong enough to stop them from invading Earth. Besides since the both have a common enemy ( the turtles ) it would make sense to team up because their combined forces might be enough to overtake the turtles so both of them can get what they want.

Kraang: April

Shredder: revenge on master splinter

Lol I just went full villian thinking