I think it would be truly EPIC. If something crazy like Gai = Tobi crap happens I will crap my pants and give Kishi mad props. There is even some foreshadowing with Tobi's wacky personality . Have we ever seen Gai and Tobi in the same place?
Erm...Tobi might be unlikely, but anyhow, Gai being a bad guy would truly throw everyone off.
What do you mean? All Madara really wants is peace on Earth, correct? He's the classic misunderstood bad guy. But I'd place my bet on Kabuto for switching sides.
Also, it seems King Kong made an appearance in this chapter. Nice cameo.