Quote Originally Posted by i_amtrunks View Post
Magnus believed that Starscream was the main threat on Earth, so once he was captured, Prime's team would be fine on their own. Primes team was left to gather the Allspark while Magnus and co returned to battle the uprising Decepticons.

Why Magnus and co dont return to Earth to recapture Starscream is beyond me. Surely he is more dangerous than a bunch of Decepticon nobodies.
Their ship was damaged by Starscream so it makes sense for them to go to Cybertron for repairs and then come back to Earth.