Is it.....
Uchiha Madara: The guy who dropped two meteors which can arguably be the size of the Juubi's Bijuu Dama without its destructive energy. Sliced mountains apart and altered the landscape with one slash of his Perfect Susanoo. The guy who made playthings out of the Gōkage and left them a bloody mess. He's got an indestructible body and infinite chakra too.
Or
The incomplete Juubi
Who is currently more dangerous for the Alliance out of these two?
My vote goes to Madara, he's probably just as dangerous as the Juubi and he actually has a working brain and a will to wipe out the shinobi world rather than no feelings or desires like the Juubi. Plus, after that assault on him by the alliance, he's gotta be pissed!
Uchiha Madara: The guy who dropped two meteors which can arguably be the size of the Juubi's Bijuu Dama without its destructive energy. Sliced mountains apart and altered the landscape with one slash of his Perfect Susanoo. The guy who made playthings out of the Gōkage and left them a bloody mess. He's got an indestructible body and infinite chakra too.
Or
The incomplete Juubi
Who is currently more dangerous for the Alliance out of these two?
My vote goes to Madara, he's probably just as dangerous as the Juubi and he actually has a working brain and a will to wipe out the shinobi world rather than no feelings or desires like the Juubi. Plus, after that assault on him by the alliance, he's gotta be pissed!