Disney wouldn't likely consider purchasing a wooden coaster, considering the maintenance costs, larger footprint, noise and the effect of weather on such a ride. Another factor that plays against such a concept is the actual feeling of the coaster itself--while some wooden coasters are smooth as silk (El Toro comes to mind), most if not all have a more wild feeling to them that intimidates many. I've spoken to plenty of non-coaster enthusiast friends and many of them are afraid of wooden coasters just because of how they are constructed or how they feel (in terms of safety) when compared to steel coasters. I believe Disney recognizes the above factors (along with those not mentioned) and in doing so, easily rules out the possibility of a wooden coaster. .