Disturbed vocalist David Draiman has hinted that the band might may break up.In an interview with Idaho radio station KQXR, the vocalist stated: "This is gonna be the last tour that the American people get to see us in for a while, if not indefinitely."The metalllers are currently out and about on the Rockstar Energy Drink Mayhem Fest, but have no idea what the future holds."We don't know what we're doing... We're not gonna do our own thing either," says David. "We have some things going on internally, we have some personal things going on. So I don't know. It's hard to tell."