Just finished it, and I agree it was the best out of three. Definitely will put pressure for Blade to top this one.
One thing I still don't get is, why Yui worked with U-Men instead called Prof X to help Takeo? I was thinking Takeo hates Prof X because he inherited mutant gen from him that made Takeo hurt people around him, and Yui knew this along with the fact that Takeo's power manifested when Prof X was around Takeo the first time. So maybe Yui think that Takeo's power will be greater and eventually out of control the longer Prof X is around him?
I was hoping Deadpool will be the fourth Marvel anime project. But at least he got cameo appearance on this one, even got X-Men logo on his costume! XD