I’m not sure about break runs, at least 2, but likely 4 at least from what I can tell. I assume they’ll be stops before and after track switch. One will probably be to slow it down at one point before entering the round building.
I’m no coaster expert. Maybe 3 or 4 trains at once? They’ll have lots of room at load/unload with the two stations now connected, so maybe they’ll have more trains on, but only dispatch with ~3 running outside at once.
By chance, will the attraction after it's backwards portion be switched to do a forward launch?