So, aside from the movie connection or whatever, it's basically the exact same reason Capcom rushed out Street Fighter V without most of its modes.

Translation: "We rushed it out half done knowing people would buy it anyway thanks to the moviethanks to fighting game tournaments. (http://www.cinemablend.com/games/What-Capcom-Finally-Admitted-About-Street-Fighter-5-Rocky-Launch-137547.html)"

Also, it's EA. Par for the course for them.