Wow, that's really, uh, overhyping him. =o Oro is nothing to Pain, and Kabuto, even less. And Madara...well, lol. Sasuke and Itachi owned Orochimaru (even if Sasuke had to wait until Oro was weakened), someone like Madara would own Oro even harder. Kabuto + Orochimaru would be deadly, yes, but not to the point where he'd be a threat to Pain and Madara.
uhm...what do you know about madara? and how can you put pein and madara in the same league when they have never faught? one could be seriously weaker than the other. Plus you cant assume that the new combined form wouldn't kick serious ass. You have no idea what techniques the new form would have or what sort of power the techniques have after.
I cba to quote the rest of your post.. you dont seem to know what your talking about :s