The combatants are as follows
Deadpool
Bale Batman
Taskmaster
Ozymandius
Blade
X24
Winter Soldier
Live action versions of all.
They each get all equipment they've been shown to use.
1) In Khazan
2) In an abandoned cityscape where they have to hunt and take each other down
3) Bonus: All of the above vs an unarmed Space Marine. They get an hour prep for it.