I wonder if Zeromus is canonically considered to be one of the Lucavi within the Ivalice storyline. In FFXII this seemed to be the case, being affiliated with the Cancer Zodiac, but I think that Zodiac stone was simply associated with Construct 7 in Tactics. If these are different, I wonder how they will be able to work around having two Zeromus variants, given the recent references to Ultima.