So I was flippin' through the recent issue of Nintendo Powa when I came across an article on Mario & Sonic at the Winter Olympic Games, and since I had nothing better to do at that moment.
Apparently the new game will have some sort of RPG-esque story mode with a story line, which might mean we'll get to see Mario and Sonic characters actually interacting this time. I look forward to watching clips of these occurances on YouTube in the future.