I hope the new intro has scenes from the gaiden, and afterwards those scenes are changed to reflect the new arc.

I mean... remember the 5th intro?
When Shikamaru appeared normally, then they added him the Chuunin Vest.
Then they changed Oro's apperanced and added Kimimaro.
Then they added Lee in his healed state.
Then they added Gaara and his siblings.

Now that I think about it... damn it... that intro surely was changed.