For those not familar with how TM works, I'd like to explain the concept of "Environments", because it's going to come up quite a bit in this review, and I want to make sure you don't misinterpret it as levels or tracks like other games. In the TrackMania universe, an "Environment" is like an area of the TM universe that the track is built in. Each one comes with a full set of track blocks, which forms what other games call the "level style". These often come with unique parts only that environment will let you place. The Environment also contains a specific car to match with the parts in that set. It's better to think of the Environments in TM as "Car Handling Styles and Track Themes".
For example, the free TM:Nations has 1 "Environment", Stadium. This comes with a stadium level, stadium themed track pieces, and a modified handling F1 Race Car(modified in that it grips loops and stunts much better then a real one would).
First, a bit of backstory. When Nadeo planned out TM2, they planned 3 environments, to be released over the next few years as part of the bigger picture "Maniaplanet", along with Shootmania and Questmania. Both the others are under development still.
The result is that TM2:Canyon is a lot smaller then TM:United Forever, at least as far as content is concerned. However, it's important to keep in mind that TM:United's 7 environments are actually:
-3 new ones from TM:United(before the Forever series), each released over a years delay
-3 old classic ones from back in TM:Sunrise, which were released at once but with a 2 year development time
-Stadium, which was designed to be a free environment for TM:Nations Forever.
So while it looks like we are getting a lot less stuff with Canyon's single level style, when you compare the two you are actually comparing a "collectors edition with all expansions" with the "first released game" of a new series. Furthermore, TM:Canyon is the first part of a much bigger idea that Nadeo has called ManiaPlanet, where all three games(TrackMainia, ShootMania, and QuestMania) are interconnected into one massive community program/project. Of course, none of that has been fully launched yet since it's going to be a pretty big multi-year project.
Now that you've got it in perspective, let's review what Canyon has to offer: