I missed that one.Or could they have consistently shown Damian to have interest at developmentally normal levels (whatever the gender) for decades. Damian expressed interest in Katana at 11. Dick teased him about Kara because of how Damian acted, and his body in the panels backed up the interest. In Teen Titans the "tension" was Djinn's interest and Damian's growing interest, along with Djinn and Crush's mutual interest.
More I don't think DC is pushing heteronomity in a family where: best friend-bi, older bother-bi, father-now bi, potential stepmother-bi, mother-polyamorous, new friend-asexual, aunt-gay, family friend-gay, family friend's brother-gay, sister-hinted to be gay...along with friend. Arch villians: Joker-bi, Harley-bi, Ivy-bi. Other older brother: hint of poly. Oldest brother has long term relationship with an alien, which Morrison recently pointed out would mean he was pansexual.
I guess my question would be, why can't Damian be straight and provide representation within his family?