This is strictly the game versions meaning only feats from such can be used.

Winner is by incapacitation

Fight takes place in the factory where the Big B final fight takes place

Batman has the stealth advantage and Big be cannot use his final wolf form but werewolf form is permitted

the armour can't be organic (ex: colossus)

the armour can't give them additional powers, weapons or other abilities (ironman)

they can't be extraordinarily fast or strong but low level superhuman is fine

Random ecounter

incapacitation or death

Location: new york subways

no people

both blood lusted

dragon slayer blade but NO berserk armour

616 Rhino

Location: new york streets in the fall

to death

15 year old guts vs human zanzief to death

Versions: berserker armour guts vs berserker hulk

location: desert

to death

this is 10 ton range bone sabretooth

Geralt has 1 day of prep

Location is in a forest

win is by death

I know this battle has been done but not like this

Geralt is entering a fist fight like he does in the game and his opponent is batman

this means Geralt has no armour, no weapons, no signs and no alchemy

Batman has his suit but no bat belt

win = KO

Strictly h2h takes place in mother Russia forest in winter

standard equipment

random ecounter

location: a forest

to win: death