From October Classic Bike magazine interview with Siddhartha Lal:
"The first new models will all be middleweight, in the 250cc to 750cc bracket. They will be based on two basic platforms. While we need more power than we presently have, we are not going to make supersports with masses of cylinders. We don't believe in technology just for the sake of it, or nudging customers towards bigger and heavier machines"
From that I assume the two platforms will be the Himalayan and the Continental GT.