Ok, 2 days to go. I'm going to take my best guess at the world's first.
I don't think this will be a totally new physical coaster element, as pretty much everything I can think of has allready been done. I don't think it will be a record breaker like The Smiler, either as we allready pretty much know the layout.
AT have come up with some dubious world's first recently. I don't expect this to be in the style of Oblivion, Air, Thirteen or The Smiler.
From. What we have seen so far I'm going for the world's first elemental coaster, based upon the medievel elements, Earth (groundbreaking - it does below the former ground level), Air (A wind effect in the building something along lines of air cannons, Fire (looks like this is going to be pretty spectacular though I have doubts about it's longevity) and Water ( a nod to the flume - personally I would love a huge splashdown that drenches you with 30 gallons of water, but I think a gentle spray or mist effect is more likely).
That's my best guess and I am sure I will be wrong.
If AT have managed after all to create a world First as genuinely groundbreaking as Oblivion, Air or Thirteen right under our noses then I will be seriously impressed.
ANYWAY, ITS WORLDS FIRST PREDICTION TIME - PUT YOUR CARDS ON THE TABLE NOW. NO MONEY ON THE LINE, JUST GLORY, BRAGGING RIGHTS AND THE CHANCE TO STRUT YOUR STUFF.