The lineup has been revealed for the inaugural Upheaval Festival. The event will take place at Belknap Park in Grand Rapids, MI on July 17-18 and it will feature the following: July 17: Staind, Chevelle, Avatar, Gemini Syndrome, Joyous Wolf, Stitched Up Heart, The Legal Immigrants, Assume Nothing, and Deadlight Holiday. July 18: Disturbed, Skillet,…