According to the OP's conditions; Bee does't know of Yamato's and Orochimaru's ability to escape underground. They don't have any knowledge on each other to my understanding. So unless Bee is told, his inceptive would be not to use any TBB's or anything that would risk injury to his teammates.
I could of sworn that was only towards the enemies. It doesn't exactly matter. Both Yamato and Orochimaru should be aware of the immense power a Jinchuriki holds. And, a perfect one at that is only all the more a monster. Once they see and or are told of Bee's power, I am pretty sure Orochimaru or either the Hachibi would formulate a plan. Sharing basic abilities and forming strategies before the fighting gets serious wouldn't be outlandish. As well as, even without the entire team giving each other the mutually beneficial information, The Hachibi and or Bee could always scoop up the two as it prepares to fire off a TBB.
In CQC, Bee wouldn't use TBB or the beam version regardless. He would need to create a lot of space between him and his targets; something that he may or may not be able to do with Kisame, Kakuzu, and the 3 elemental masks hounding him. Not to mention, that Bee would need to explain to his teammates that he is about to whirlwind, which gives the opposition even more room to counter.
I am not saying the, as I shall call, cannon variation of the attack will come out soon or anywhere near at the start of the battle. Merely it can be shown later on in the battle.
As for the bold: I think I will just go into detail on how Kakuzu and his masks will be the first to fall.
The plan of action; After the recommended information has been tossed around, will be to separate and destroy the opponents. Seeing as how team 1 is out numbered, it's not going to be a question as to when Kakuzu will release at least some masks. With the division made, both Yamato and Orochimaru will use either the mayfly or, for Orochimaru, attack prevention jutsu to escape view.
As this occurs, Killer Bee will take his own full Bijuu Mode and rightfully so, occupy team 1's thoughts. The Hachibi at this point will just serve as a distraction as Yamato and Orochimaru make their own move. Resurfacing ontop of Kakuzu, Yamato will most likely go to restrict his movements with Mokuton. Even with his Domu defense, it will be put down and useless before the chakra resisting abilities that Mokuton possesses. After that, the Kusanagi blade will be thrust into Kakuzu to "kill" him.
At one point, you mention a Katon and or fuuton combination attack to free Kakuzu. I believe below me, so I will kindly like you to reread this or recall this. To take the nesscary steps to make sure that this attack doesn't land and free/injure the group. Yamato (And or a wood clone, if he needs to) can use a
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for either a natural barrier from the attack or lowering the earth. Possibly both, if needed.
Pending on how the battle goes, this could take Kakuzu's main body out for a moment or two. Or, allow them to see what Kakuzu's trick is with his hearts if he has multiple in him at the time. If the latter, it's likely that Kakuzu will be dispatched soon afterwards as Orochimaru and Yamato aim for the released masks.
Which, with large scale snake summons, fuuton, Mokuton, the levitating Kusanagi blade, Doton and Suiton... It won't be exactly a hard task. Maybe a bit time taxing. But Kisame and the Hachibi would be at it for a considerable amount of time.
If this predicament ever arrises for Kakuzu, he can simply have his Katon [+Fuuton, if necessary] Mask(s) free him from the Mokuton binding, and while the AoE of the attack should be withstood by Domo, it could potentially one-shot Yamato and force Orochimaru to use that body replacement technique thing of his.
Orochimaru would probably not need to sue the body replacement. The rest is basically up above this quote. But, Orochimaru had still encountered a buffered TBB cannon and didn't replace his body for quite some time. A combo like that wouldn't make it a necessity.
Also, Kakuzu's raiton would effortlessly be able to cut off each and every one of Bee's tentacles seeing as Sasukes Chidori had no trouble doing the very same. With no tentacles, Bee wouldn't be able to perform the whirlwind, and thus loses team two's only sufficient counter to the WD.
@Bold: No. What? No. Gian has what cutting feats? Correct me if I am wrong, but raiton is the element that is known for piercing. Which is exactly what Gian would do. Unless Kakuzu is capable of manipulating the cast bolt of lightning it would pierce through the tail and make nasty hole. I don't see why it would be able to cut it off, when Sasuke only did that when he had control over the attacks movements.
Concerning the Water Dome. It would be a terrible jutsu to be stuck in, possibly over for this team if, let's say the tentacles were no longer a factor. But. Kisame won't be using this jutsu up until after Kakuzu is dealt with, out of not wanting to have "friendly fire" going around.
Also, once Kakuzu is defeated I don't see Kisame exactly winning this. The Water Dome, if it does come up, can be countered with the Whirl Wind. With a warning, everyone would be capable of hiding under ground. But Orochimaru now possessing a sensors body would be able to keep track of Kisame even still. And he would of wasted a considerable amount of chakra using the Water Dome just for it to fail. He's basically unable to win this unless he manages to take out the group one by one. Which... Is unlikely when they can take refuge on the local environment from Kisame or ontop of the Hachibi.
