I'm fine with no villian(s) in the next movie. In a two-hour movie, they could visit two or three planets (perhaps searching for a planet suitable to become "New Vulcan") and have a couple of things happen in space, too - other ships, friendly or otherwise.
But if we need a villian, I suggest The Gorn.
No, I'm serious. Think about what we know of them:
Territorial
Fast ships
Powerful weaponry
Physically strong
Very intelligent
The only fault of The Gorn in "Arena" was its appearance. That can be greatly improved with today's movie technology. Let's have a whole ship full of them duke it out with The Enterprise - both on a planet, sort of like the Rigel fight we never got to see in The Cage - and later in space with the usual phasers and photon torpedoes and such.
But if we need a villian, I suggest The Gorn.
No, I'm serious. Think about what we know of them:
Territorial
Fast ships
Powerful weaponry
Physically strong
Very intelligent
The only fault of The Gorn in "Arena" was its appearance. That can be greatly improved with today's movie technology. Let's have a whole ship full of them duke it out with The Enterprise - both on a planet, sort of like the Rigel fight we never got to see in The Cage - and later in space with the usual phasers and photon torpedoes and such.