Guitar Hero: Metallica
If you downloaded the Death Magnetic album for Xbox and PS3, those ten songs will play in their entirety in the full game mode. PS2 and Wii versions (coming in the Spring, most likely in early May) will include Broken Beat & Scarred, Cyanide and My Apocalypse since they are not compatible with the Death Magnetic downloadable content.
*tracklist subject to change*
Thank you for your question! No, it does not come with a guitar.