One time while waiting in line for Bat, I saw someone point out some concrete footings under the station, and their friend said it was part of Son of Beast!
It's probably unlikely, but we could see some sort of small hint towards a new attraction sometime during the 50th celebration. I really have no idea though.
Not sure if someone said this before me, but earlier in the day before the Orion incident I was heading over to get on MT, and noticed that the train was stuck right before it went into the shed. Add that to the list.
I never really go on opening Day because the crowds are virtually impossible to evade. However on a normal day go right when the park opens, at least that's what I do and it usually works. I never eat at the park since the food prices can be outrageous at some places. Hope I provided some advice.
If they could build some sort of ride here, it would be nice if they created Action Zone into a sort of spooky theme, like Bat and Banshee, and then give the new ride a scary theme as well. Just a thought.