It's been rumored by people close to Nadeo that Stunt mode will come with ManiaPlanet 2.0.
Hylis himself said that ManiaPlanet 2.0 will introduce something called "title packs", although there has been no further information about what those packs are about. We do know that Nadeo is referring to each "environment" as a separate "title" though. And we also know that Hylis announced in their blog that additional blocks for Canyon would be coming at some point.
I would personally guess that ManiaPlanet 2.0 will also introduce the way to switch between titles/environments (instead of launching directly into Canyon as we do now), but time will tell.
Recently Cerovan said that SM Storm would most likely come in "first semester" of 2012, and TM2 Valley would come in "second semester". That's not very specific, but gives us some idea to the timeframe we're looking at for the new environments.
All of that above is from the ManiaPlanet forums, not the magazine.
Hopefully the magazine gives us something new to talk about.