If you took all the dangerous animals of the earth and let them all fight who would be left standing?

Okay, you'd have a Grizzly Bear, Polar, Bear, (All the Bears), Lion, Jaguar, Tiger, Pit Bull, Rottweiller, Alligator, Wolverine, Badger, King Cobra, Boa Constrictor, Eagle, Falcon, Vulture, Hippopotamus, Rhinocerous, and Komodo Dragon. Put all these animals in a Gladiator stadium and let them go at it. Who would win? Also, if someone threw you in there, would you poop your pants? Hahaha!