As you may ( or not ) know, the malicious Sha'army has encountered a new foe. And it is -
Wait for it... Wait for it...
The Gua People
Years ago, there was a planet know as Greenatia, and - as you might have guessed, all green living organisms lived there. Yup, you read that right. There were tons of green life forms there, including: the Hulk, Shrek, Yoda, grass, the Gua people, you name it - and yes, even Kermit.
But for some reason, most of the living things there suddenly left the planet or died, at the same time. Didn't get that? Let me show you:
Hulk joined the Avengers
Do I still have to say anything? Every single person who knows the Avengers should know Hulk. If not... I can't help you.
Yoda joined the Jedi Council
What more can I say? Of course, Yoda has been in the council way before the war, so some people may wonder how exactly he was on Greenatia. Maybe Memit Nadill force-searched for him and found him, and took him back to Coruscant for training - Oh wait, Memitt was green too...
For some unknown reason, Shrek was bathing in his mud pit when he blew up. The end.
So, with only the Gua people left, Greenatia became Gualand.
So, how are the Gua people at war with the Sha people?
The Sha general discovered that Gualand is basically a land of melons. He also found out, that if the Sha'army absorb a lot of Vitamin C, they become huge, monstrous entities like gargoyles.
Uh, yeah. Something like that.
And what has a lot of Vitamin C? Watermelon juice.
So now they are all in a rage to get the juice, and the Gua'army has to prevent them from doing so.