Sega has released a new trailer for their upcoming Sonic Generations which will hit pretty much every system imaginable. The new trailer below gives us yet another look at the old Sonic running alongside the new Sonic in a variety of environments from the Sonic the Hedgehog universe. It is really cool to see one of the levels from Sonic Adventure 2 remade in 2D form... really gives you a sense of what the game is trying to accomplish.