Quote Originally Posted by toinks2010 View Post
Rasengan idea was very great 4th is really a genius.. I think its only coincident that its also the same idea with the beast bomb because its show on the flashback that its the 1st time 4th saw kyubii use it after naruto's birth or there are still some back episode that still not shown.. The problem with the new resengan is it consume time to form it and sasuke attacks or skills are to fast..
I doubt Kishimoto planned that far ahead, I'd be more inclined to believe he stumbled onto this idea during the Kyubi vs Orochimaru fight.