You're probably right... because there is absolutely no other way they can win. Madara is invincible and the only way to beat him is to seal him, but that is almost impossible. Then we have the Ten Tails, which flicked the Bijuudama away like it was a fly... that same Bijuudama put the Eight Tails down.
If both the Eight Tails and Nine Tails, not to mention Naruto are having a hard time.... all those fodder Ninja are completely and utterly useless. Madara bitch-slapped all Five Kage single-handely without breaking a sweat - so they aren't going to help much either.
This fight might end in a very anti-climatic way.