I think Kyo would be pretty much useless in this fight because of Hauzers resistance to fire. Ryu won't fare much better, but can put an electric element into some of his attacks - what they really need in their team is someone who can use water and maybe ice based attacks. I don't think physical attacks from them would do much harm to this beast. If they work together in a tag team kind of way to wear Hauzer down and tire him, they might take it.
If we go strictly by gaming abilities Kyo and Ruy would kill him in no time - I think Hauzer sucks as a gaming character - but maybe that's just because I have no interest in mastering him.