This latest trailer for Mario's upcoming epic showcases the two-player features, Cloud Mario, and the game's Super Guide features...

Cloud Mario was revealed by Nintendo last week, the newest in a long line of power-ups to be included in Super Mario Galaxy 2. With a spin-jump, Cloud Mario can create fluffy white cloud platforms in mid-air.

Also confirmed was an expanded co-op experience, with the second player now controlling the Orange Luma alongside Mario, who can fly and spin-jump around. Both new gameplay mechanics are shown off in this latest trailer, which also appears to show a Shadow version of Princess Rosalina acting as the game's "Cosmic Guide" (read: Super Guide), giving players a walkthrough of tough levels:

Have you pre-ordered Mario Galaxy 2 yet? If not, what the grus are you waiting for?