2. yeh. just making it the army less OP or having a reason to explain why they suddenly are less powerful.

6. yeah that's what i was thinking, except like, the weird fungus and creatures would shoot the acid for it. 

so yeah

that's the monster, I guess. If not, just say so

Now, where should this happen? On some far out planet, isolated from the others for one thing. 
A rocky, cold planet? To contrast with the red's and weird organic materials of the Threat? (i'm calling it that now nerd) Maybe a somewhat major city somewhere nearby to encourage the fight along.

Obviously, the whole planet wouldn't be just rocks and cold, it would have plant life and forests. it would just be a planet of cool colors. faded blues and grays, very light greens and an almost teal sky. then the monster comes in with it's dark purples, red's, dark greens, and wet texture.

ye