Couldn't have put what Tom said any better there.
In my opinion, there are only 3 manufacturers that will really suit this area with their style of rides. RMC, GCI or GG.
I personally cannot see this being anything other than an RMC, it is the only one out of those that will really strike a chord with the GP and will definitely please every single person to ride, be it enthusiast or GP.
Something to also note is that John Wardley is involved in this and seems to have finally had his way with a wooden coaster of sorts