the same as releases are now, 50-60$ for a console game. its more about the effort of development, the size of the game to produce. The cartridges will be probably cheaper than disks because flashdrives have gotten insanely cheap for large sizes
i.e. think of DS cartridges, they're just little flashdrives.
But yeah you should expect 50-60$ like regular console releases. its more about the effort involved in the project. You're not going to get a brand new 3D console Mario to release at 40$







