I know little of One Piece (terrible dub made me shy to it, but I'll remedy the situation once I find some time to watch it), but the Gotei 13 have hax. Like, a lot of hax.
As you downplay ben beckman. He is one of the highest tiers in one piece going off hype. Kizaru was right to stop in his tracks. Didn't you notice how they single handedly stopped a war? It is highly likely that ben's haki is above kizaru's and if he took that shot he would have died. Notice how when two fodder levels were shooting at him he just didn't care and minded his business. But when ben does it he just haults?
Clearly the pecking order was established kizaru being below the worms in teh dirt and beckmans stool.
Like i said kizaru can teleport circles around them and he can spam it too as seen with his fight with z. Not to mention them not knowing any of the admirals stops them from auto targetting kizaru. They will have a hell of a lot to worry about as akainu rains gigantic magma fists from the sky and aokiji is freezing everything in the area. Not to mention kizaru's casual lazer kicks can do damage to all of them.
Soifon's two hit is cool but kizaru can teleport and aokiji has been shown to manipulate his body to open holes in it when attacked. Not to mention if she uses it on akainu or aokiji her hand will end up with permanent frost bite or be melted to nothing.
In character yamajii wont know he can solo until its too late. Look how many times they've had trouble and he waits until its someone he knows is a serious threat to fight with his bankai. Either he will unleash it at the last second when he realizes its too late and solos or he could be one of the first casualties considering its just an all out fight and people will be referring to him as the leader.
In all honesty, the bleach team's only chance of victory really lies with Yamamoto. Shinji's shikai may also cause trouble, but the rest of the captains would go down. So yeah, Gotei 13 wins. But it definitely isn't a stomp. Especially if everyone is in character
@luthluth: Did you also seem to notice how ben snuck up on kizaru without him noticing until the gun was too his head and already cocked? Ben told him not to move. Which means ben knew kizaru could escape but the threat was the fact that once he moved he had to fight ben. Which he could not come out of unharmed.
Also kizaru is seen teleporting while in full person form and reappearing in the same form. I don't get your point. You also don't make any sense though. Kizaru is light. Regardless of his exterior he is always light. The only time his body wouldn't be light is when someone with haki hits him. I don't even seem to remember an instance where kizaru was in "full light form".