Actually, it did release on Genesis in the West as "Warsong". I played it long before I knew what Langrisser was.
My friend's family had it on Genesis, and I used to borrow it. Eventually, he let me keep it when he was cleaning out his basement of old games. I still have it, plus the Sega Saturn imports: Dramatic Edition (Langrisser 1 & 2), Langrisser III, Langrisser IV, Langrisser V. And also Langrisser Re: Incarnation Tensei on 3DS.
In any event, I'm beyond hyped for this. Love me some Langrisser.
Ooooooooh. I had no clue. I know about the awesome Saturn imports.