Apparently the team is "nearly finished" with its next project for Nintendo. But what is that project? Yeah, no idea. Here's what the original story has to say about keeping secrets:
Right now, the 20 employees at Monster Games are working on a top-secret video game for Nintendo. They’ve worked on it for two years and are nearly finished. The process is so private the designers must darken their monitors when the bottled-water deliveryman enters the office.
I'm having trouble pegging this as a simple sequel to Excite Truck. That probably wouldn't take two years and probably wouldn't need to be so hush-hush... though maybe they just like the super spy nature of keeping their water guy in the dark. About a year ago, the long-gone rumor blog run by Surfer Girl (we miss you!) posted an unsubstantiated bit claiming that this game wasn't Excite Truck 2, and that it might be an F-Zero sequel. Now that seems like something that might take a couple of years to get right, and something worth keeping secret.
Fingers crossed over here, as I would be interested to see an F-Zero sequel right about now. Or, I guess, sometime next year, which is probably when all of us--including the water dude--will get to see the fruit of Monster's labor.