Not good as a legacy ship. For one adaptation? Meh, sure. But it's not a thing. He's 13, she's 20-ish. Fairly sure that's illegal even on Azarath.

Perfect in DCAMU.

Potentially great in comics once Damien matures more.

I’ve probably seen more tweets about them than anyone else following the Apokolips War movie, except perhaps for the Trigon-Darkseid fight.

If Damian matures more, so does Raven. Still not half your age +7.

And? My girlfriend is five years older than I am. My dad is seven years older than my mom. And Diana Prince is a few hundred years older than Clark Kent. Damian Wayne is a very refined and postured man in AW.

Whether age difference is ick depends on how old you are. "half your age +7" isn't law, it's an arbitrary limit people some people use. A 20 year old "shouldn't" date younger than 17 (well, 18), for a 30 year old it's 22. But sure, purely subjective. Date who you wanna date, as long as it's legal.

Even then, it wouldn't work with the comic book personalities of the characters.