I already shown you a scan that shows sai himself stated that his jutsu was being overpowered by sasuke.
When those wall/roof was collapsed, yamato said he sensed sai's chakra. And based from yamato himself, he just stated that he'll know if sai or naruto or sakura molded their chakra because of the seeds (transmitter) inside of their body. So, the wall was destroyed and yamato sensed that sai molded his chakra, what does it mean?
ANd there's no such thing as sasuke used his katon to overpowered those ink snakes.The manga itself didn't show any katon nor sasuke did the katon's hand signs. If there is, then show it.
I had the opinion that those pose/handsign isn't for kirin because we haven't seen any fire dragons ascending into the atmosphere. That's one of the prerequisite of that technique right?
So assuming that it was another technique of sasuke isn't nonsense at all.
---------- Post added at 12:22 AM ---------- Previous post was at 12:09 AM ----------
It wasn't about being positive to sasuke or not. I'm just making my point that those technique isn't exactly the kirin. Because we've never seen any of his fire dragons that destroyed the roof/wall.
Slowly but surely I'm starting to visualize those events before my inner eye...
Either Sai drew one of those cartoon bombs and threw it at Sasuke, only for Sasuke to kick it back at Sai (thus overpowering his jutsu)... or Sai drew a freakin Baneling!
Or Sai wrapped him up with his super special awesome ink snakes and Sasuke muscled out of them with the Curse Seal, since they're SO powerful, hence Sai's surprise when Sasuke managed this godly feat.
Then Sasuke used his katon to create Kirin. Because that's what the jutsu was. Kirin.
Secondly, why would Orochimaru teach Sasuke anything like that, when the entire point was that Orochimaru was gonna take his body. It makes no sense Orochimaru would teach Sasuke some powerful forbidden technique that could potentially be used against him, unless there was some drawback like with Kirin.
Third, Sasuke is far from being incompetent in creating his own techniques, seeing as he created the Chidori variations all on his own.
Fourth, you're link is of Tsunade presuming Sasuke used some forbidden technique to strengthen himself over the timeskip. Aside from it being nothing but a guess, that really doesn't change anything about the Kirin argument.
And fifth, you seem to be ignoring the fact that it's been outright shown that developing such a high ranking technique would take years to do. Unlike Naruto, Sasuke didn't have any means to make training easier. Not to mention he was also busy developing his Chidori variations in secret during that time too.
What evidence is there that Naruto doesn't have a "hidden" jutsu?
None, though to be fair it doesn't help that Naruto can randomly pop out a bunch of new techniques without any foreshadowing.
The thing is, you said that it was made clear that the kirin was sasuke's ace in the hole against itachi, if that is the case, then why would he use it against naruto and co?
Sasuke : orochimaru, train me now.
Do you expect that orochimaru trained sasuke in shuriken technique? sword technique? fighting technique?
So for more that 2 years, sasuke was busy in developing his chidori's variations in secret? Holly cow, then it means that naruto is more awesome than him. Naruto developed some of his rasengan variations in his training with bee. I think it's just a week. Vacuum rasengan, planetary rasengan, mini frs, and 9 tails rasengan.
Though yeah, Kishi's had at least two hundred chapters to reveal it, but I'm guessing he's saving it for an opportune moment. Could be bijuu rasengan, but it begs the question as to why Naruto didn't know about it until Bee told him.
Why wouldn't he use it against them? It's basically an instant KO. And it's not as if using it against them would somehow ruin his change of using it against Itachi later.
You do realize none of those involve any nature manipulation, right? Combining nature and shape manipulation is what takes time.