Well, that was a rather short-lived (but nonetheless exciting) rumour.
The head of Universal Pictures, Donna Langley, had suggested in an interview with The Hollywood Reporter that there was a strong possibility that NWA would reform, with Eminem taking the place of the late Eazy-E. It was said to be part of a promotional tour for the European release of forthcoming biopic 'Straight Outta Compton'.
Now, it seems that the rumours were unfounded, as Rolling Stone reports, saying: "A rep for Dr Dre and Eminem tells Rolling Stone that despite reports to the contrary, the pair have no plans to tour together either solo or with NWA."
Oh well.