Sonic Anniversary: True or False?

So, you may have heard the rumours about a game called Sonic Anniversary, which is set to contain multiple levels from games ranging from Sonic 1 to Sonic Adventure 2. But do you think this is true or false? If it's true, what stages do you want to see in it?

Green Hill Zone's a given, but as for Sonic Adventure 2, I'd like to see City Escape as a level. It was one of my favourite levels in SA2, along with Security Vault, Metal Harbor and Radical Highway. As for Sonic Adventure, maybe Emerald Coast or Casinopolis? Maybe some of these levels can offer other characters to play as, such as Tails in City Escape? (Don't know why I chose Tails for that...)

Chemical Plant Zone from Sonic 2 - even if only for the awesome music . It goes without saying that Knuckles should also be playable.

As for the other rumour, how about "Mario Vs Sonic: Grand Theft London 2012" - three franchises for the price of one! Seriously though, Mario and Sonic teaming up for a platform game is precisely what the fans and old school gamers want to see. Given the significance of the two characters, they deserve more than a sports compilation (at least when they got Mickey and Bugs together, they went skydiving).