What exactly is so imperative that must be kept secret? The location of the hideout? I guess if they're trying to hide away the jinchurriki throughout the remainder of the "war" then ok whatever, but its not like they need to buy anymore time. Naruto got his uber upgrade, Bee already had his awakened power for a while, and frankly I dunno how the plant guy wasn't watching where Kisame was going when they went out to sea in the first place.

In other words, Kisame will probably be defeated since he's not wearing his cloak, but the jinchurriki will be forced to fight anyway, either through their location being revealed or out of necessity, and everyone's going to be helpless except for Naruto and maybe Bee.