Unless Vekoma has changed their new track design, the coaster looks to be on a maintenance track.
I also wonder what the hourly capacity will be like. I remember a disney official saying that they were not impressed with the recent e-tickets having a lower than average Disney standard hourly capacity. I hope Disney has taken into account this problem before construction began. Rockin roller coaster has an operational capacity of about 1700 per hour, however RRC has 24 riders per vehicle while Guardians has 20 (if the attraction poster is correct). I would assume that then there would be, hopefully, multiple block brakes within the main show building.
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If this layout of the showbuilding is correct, then I would assume that the huge space for loading and unloading may mean that there could be two load areas, like Space mountain at WDW. Maybe they are implementing the omnimover system like hagrids. It is really interesting as to why the load and unload area is so big. So if there are two loading stations, then thats a additional vehicle. RRC has two block brakes within the show building so I'd assume that Guardians would have 2-3. Hopefully the attraction will have a higher capacity than RRC. Guardians will overthrone Test Track as the main e-ticket in Epcot; everyone will run to it first in the morning. So I really hope Disney knows what they're doing with the capacity of the attraction.