Oh no! What is this? The X-Men have been captured by a shadowy government agency! They've been blasted by Forge's mutant neutralizer (no powers!), and then by the Hate Monger's hate ray! Then they've been thrown together in an escape-proof arena, and made to fight each other for the amusement of paying customers!
So, who wins? This is current X-Men, so everyone represented in this picture.
So, no powers, but with bloodlust, as the hate ray makes them all crazy. No weapons, unless it's something they carry (Wolverine keeps his claws, Pixie has her soulshard dagger, Warpath has his vibranium daggers, etc.). The neutralizer does not remove physical mutations, like Angel's wings, or Nightcrawler's tail and features. Hepzibah, not being a mutant, is unaffected by the neutralizer. Just to make things SLIGHTLY more fair, no firearms.
One last thing, just so no one forgets...Wolverine's adamantium is a huge problem when he has no healing factor, and is slowly killing him.
Any takers? Who goes down first? Who lasts the longest? Can the sheer amount of training make up for the loss of powers?