I have to agree, I think you would be watching a fight to the death. The fish are all from very different environments and need different kinds of water perameters. The fish would be way too large once adult size even if they did not kill eachother.
+1 to both comments, they don't even house those fish together at the pet stores. is there a reason you want so many different fish while they are small? why not make a solid plan that will last and provide a healthy environment for the fish?