As long as the hovercraft does make it in the game, you can guarantee my purchase. For years I've been waiting for a proper hovercraft simulator/game. I was so angry when I found out the LCAC had been cut from BF2 in early development, such a hard craft to code I guess.
I'd be interested to know how you tackled some of the features, like engine controls, model dynamics, maybe parametric animation for the skirt?
Your team must be really skilled to take up the job, so good luck!