Next Level Games Working on "Top Secret" Game?

Next Level Games is apparently working on a "top secret game" as described by lead designer Devon Blanchet.

It would be concerning if a studio isn't working on any games, but it seems that the folk behind Punch-Out!!, Tom Clancy's Ghost Recon (Wii) and more recently Luigi's Mansion 2 has already started work on a "top secret game" and has been doing so Since October 2012.

The listing was spotted on Blanchet's LinkedIn profile by Emily Rogers.

Whatever project Next Level Games is working on, expect some form of reveal later this year.

What do you think the studio is working on after putting the finishing touches to Luigi's Mansion 2?