As _koppen says it won't be a wooden roller coaster.
Now, I've been talking to the park C.E.O. these days at the EAS and he has confirmed a coaster that goes 85 km/h on a 1 km long track, so to me it sounds like it have two launches. Intamin's C.E.O. also told me in an interview that they had something for next year in my country (Denmark) that would draw attention.
My guess is still and Intamin Multi Launcher, like a mini Cheetah Hunt or something.