~The Wickerman~
The Evanghelist
The OP mentioned this is some sort of neutral ground, aka not city, aka arena-style. It is very easy to notice your enemy's movements in an arena environment. Also, it is very hard for Spiderman to use his abilities to the fullest in such an environment.
Cap is a non-factor, as nothing he can do would even phase Colossus. He would most likely be the first to be taken out.
That leaves Spiderman and Wolverine. What can they do against Colossus? Individually absolutely nothing as far as I can think of. A fastball special by spiderman and wolverine would be hard pressed to surprise Piotr in such an environment, and that would lead to MMX's notes as can be seen earlier aka uppercut, thunderclap, or just "put your hand out and watch Wolverine suffer". Assuming that SOMEHOW through some miracle they surprise him (which again I note they would be hard pressed to manage, please keep in mind that while he remains in metal form, Colossus is still.....very..........very.........VERY hard to kill.
Managing to pierce his skin a little with the adamantium blades would accomplish nothing other than to get wolverine close enough for Piotr to hurt him in ways previously unimagined. I'm picturing a large organic steel fist being rammed up Logan's rectum while Spiderman makes a pun about Colossus being a "pain in the butt". This will soon after be followed by Spiderman's untimely demise due to the fact that as mentioned, Colossus does not need to breathe, eat, sleep or rest in any way shape or form (AFAIK) while in metal form.
Those were my two cents 🙂