Rapper will reveal all on Thursday (March 12)
Film tells the story of Eminem's 'Shady Records' label
Song is taken from last year's 'Shady XV' compilation
Gage Garmo's dying wish was to meet his favourite artist
Detroit teen Gage Garmo is believed to have just days left to live
Rap trio claim rapper sampled their track 'Lookin' Boy'
Original version of the song first appeared on 'Shady XV' compilation
Sia collaboration now has a boxing themed video to accompany it
'Shady XV' features the best of Shady Records' back catalogue plus new material from Eminem, Slaughterhouse, Bad Meets Evil, D-12 and Yelawolf
Mixtape arrives ahead of Shady Records compilation 'Shady XV'