(Steve Mitchell/Invision/AP) (Steve Mitchell/Invision/AP)

Grizzly-voiced Kendrick Lamar ignited a hip-hop firestorm -- and possibly an existential crisis -- earlier this week when he took nearly a dozen peers to task in a scathing verse that's being dissected line by line. Perhaps he should have consulted his own tour schedule first, because this could get interesting.

Among Lamar's list of nearly a dozen lyrical targets: J Cole, Big KRIT, Wale, Pusha T, A$AP Rocky, Big Sean and Tyler the Creator, who, as luck (or synergy) would have it, will appear at the Rock the Bells hip-hop roadshow, which is bound for the RFK Stadium grounds on Sept. 28 and 29. And guess what? Lamar will be there too with his side project, Black Hippy.

Those hoping for an on-stage rap battle to settle the score may have to keep waiting. Lamar will play the festival's second day, while Big Sean, Tyler the Creator, J Cole and Wale are all booked for Saturday.

The bill is packed with other up-and-comers who Lamar probably just hasn't had time to call out yet, like Earl Sweatshirt. But Rock the Bells has specialized in delivering a hit-list of old-school stars, and this year's lineup is no different: KRS-One, Slick Rick & Doug E. Fresh, Rakim, Big Daddy Kane. Also on the bill: Virtual projections of Ol' Dirty Bastard and Eazy-E, who will appear during sets by the Wu-Tang Clan and Bone Thugs-n-Harmony.

Tickets for Rock the Bells start at $128 for a two-day general admission pass, and $76.50 for single-day admission.