The official Ace Combat YouTube channel has been occasionally been posting remixes of music from the series by Keiki Kobayashi and Bandai Namco sound staff for the past few months, and the latest one is an arrangement of "ZERO" by Kobayashi:
https://www.youtube.com/watch?v=IJohexRaTgA
On Twitter, he explained that it was dedicated to Chick Corea, whose music helped him to write "ZERO":
Really surprising revelation to me haha, although after hearing the Spanish guitar lines recontextualized as EP noodling, I can kinda see it