Just my opinion, but I do not think the new coaster will negatively impact the current Frisco Line experience in any way. Just as PK is visible during the trip, I believe the train will soon go through or around a portion of the new coaster, but won't be overpowered by it. They simply have too much land to work with to be worried about dampening the ambiance or scrapping the robbery show. The train goes way too far out to be concerned about any of that.
