Disappointing In short: the best part was the opening credits.
The movie itself... I think it's a great idea but... ruined by a bad script, a plot full of holes and irrational moments (why didn't Tanaka give them the combination? Why didn't "x" tell who it was the traitor? With thooousands of zombies, why did they just kill the queen? Etc).
The selection of the casting did not help, mainly because of the choice of Bautista as the protagonist; he can do well as a secondary thug, but definitely not as a main character. I have connected more with secondary characters, like Tig Notaro with a great personality and acting, than with David.