Board Thread:Theories and Speculation/@comment-45986362-20200802120015/@comment-2245550-20200816045453

Metangdude101 wrote: However, grown-up Rock Lee can do all of the Eight Gates, so if he did them fast enough, he could beat Neji Hyūga. Also, only three people in Naruto were known to use Eight Gates, so I don't think that's been proven. If they are just charging up, they could still move around.

We saw how all 3 opened up the Eight Gates, and that required them to stand still and power up like a typical anime character in every instance, if I recall correctly. So it doesn't matter how many gates Lee can open, since opening up to the third is more than enough to take Neji out, but if he can't do it fast enough, Neji wins every time.