Sure

This whole thing is confusing. :|
Here's the link. Its an old thread, so please don't bump it. I may edit later though and bump it myself.... but a lot has been revealed since then lol. My convos with Pssukar is the primary factor in this, I think he did most of the convincing for me.
You must be registered for see links
The bottom line is that Naruto knew exactly what Jiraya was talking about when he told him not to use 'that jutsu' early in part two. Considering Naruto's level of training back then, 'that jutsu' could only be Omada Rasengan or just the use of Kyuubi chakra in general. Considering what Naruto has done to his friends and master when giving in to the Kyuubi's will, it is almost certain that 'that jutsu' refers to Naruto giving into the Kyuubi's will and simply using its chakra.
Let me repeat, from all we have to learn, 'that jutsu' does not refer to a particular jutsu, but the general use of the Kyuubi chakra, the very thing that wounded Jiraya and knocked Sakura unconscious. If this is still at all unclear, let me know.
well it said "naruto needs to complete that jutsu"
ït doesn't say learn that jutsu or anything like that,
if he says complete, it means that "that jutsu" is incomplete.
at that point of time, what incomplete jutsu naruto had which involved the kyuubi and a seal?
It is the Bijuu Dama.
RDS doesn't involve kyuubi, nor do FRS/RS .
And if you remember, naruto had to break a seal before getting kyuubi chakra.
well all these key points makes me think it is bijju dama.
But Naruto did not know about the existence of TBB early in part two and had no way of being introduced to it back then. As I just explained, there is a 0% chance that 'that jutsu' can be TBB based on this fact alone. It can only be referring to the general use of the chakra and thus the act of giving in to the Kyuubi's will, THAT IS ALL.