It's basically the same schedule as the 2D games. There's a rough, basic one, then a weird, polarizing one, then a totally awesome one that really finds its groove, appeals to everyone, and has almost seamless controls, then finishing off with a fancied-up and almost perfected version of the awesome one (with new levels and stuff and all) that takes half the time to make (2D games had 2 years between them until SMW, which came out 1 year after SMB3; 3D games had about 6 years between them, SMG2 will be coming out about 3 years after SMG), and along the way there's also two Mario sidescrollers and a bunch of crazy new Wario games. The main distinction is that while SMW was the first 2D game to not be on the same console as the others, SMG2 is the first 3D game to not be on a different console. Kinda cool how that all works out.