>>2504772Not him, but I guess I'll throw out my two cents about the BRS "world".
I honestly always saw BRS's world as mere parallel world where the interactions in this world happens as fights in the otherworld. Not exactly a "dream world" but a world as real as Mato's where both world influence each other. You catch my drift?
And the OVA's timeline was retconned by the anime, so whatever happened in the OVA never happened at all.
Sorry I can't contribute much though, it's been years since I've last seen the OVA/anime.