It's unfair because the Venom Symbiote has spider-mans powers. So it will give them to batman. A more fair fight would be if the original symbiote found batman and the original symbiote also found Spiderman...do you see what I mean? ANyone who has the venom symbiote has an advantage of Spider-man because they have spidey's powers and know spidey's secrets/immune to spidey's spidey sense