Board Thread:General Discussion/@comment-26249295-20150327080352

So the crystal gems repulsed the initial incursion of the homeworld gems...but these things have a way of escalating. They will return, with yellow diamond, with a bigger force, with whatever. Point is, the crystal gems will be outmatched. They will need additional reinforcements...but from where?

Enter: Steven Universe. We saw in Monster Buddies that he tried to rehabilitate the centipeedle queen. He gained progress, but was ultimately unsuccessful - but possibly as much or more than his mother was able to accomplish. I think we will see in Steven that his unique nature - friendliness, sympathy and optimism from his human side, power, healing, and Rose Quartz's love from his gem side - will allow him to surpass his mother in terms of rehabilitating corrupted gems. The end of Monster Buddies is a Chekhov's gun scenario. Steven will be back to the centipeetle, he will heal it, and he will rehabilitate other broken gems. There are so many various gems scattered throughout the episodes. So homeworld gems, when they come back, will face more than they bargained for. Perhaps the monster gems will remain as monsters, perhaps they will regain humanoid shape.

TLDR: Steven heals monsters, makes them allies, fights homeworld off with them.  