It depends if Scorpion gets access to his realm. Nonetheless, Ryu teleported to the Fiend Realm and kicked the Lord of the Fiends ass and with ease.
I admit Liu Kang is a badass motherf*cker, as well as S. Zero, and they could fight toe to toe against the ninjas. Keep in mind that although Liu Kang has his firepower and S. Zero has his ice moves(lol), Ayane and Hayate have techniques of their own that are pretty devastating. Hayate has the Torn Sky Blast and Ayane has that spell she uses in DOA4.
What if Ryu uses his Inferno against S. Zero? How much damage do you think it would do?
I remember in some MK movie Raiden shot back S. Zero and Scorpion with electric bolts from his arms, so I'm wondering Ryu would do the same thing to both of them.
__________________________________________________
I'm going to make a scenario of what might happen.
Ryu charges S. Zero and attacks him. S. Zero gets damaged and continues to fight Ryu.
Scorpion shoots a breath of flame in Ryu's direction. Ryu teleports out of the way and the attack hits S. Zero!
S. Zero: "What the hell!?"
Scorpion: "...."
Ayane fights Liu Kang and Hayate assists Ayane. Lui Kang is outnumbered.
S. Zero shoots a ball of ice at Ryu, who dodges it. Ryu jumps and executes a Flying Swallow on S. Zero.
Scorpion shoots his bloody spear at Hayate, who blocks it with his sword, but Hayate suddenly realizes that the thing moves on in all sorts of directions! Hayate continues to dodge the kunai and charges Scorpion and attacks him.
More to come...