Dream Theater, Fear Factory, others on bill.

Megadeth founder Dave Mustaine will launch a six-week festival tour in late July. Joining Megadeth on the main stage for "Gigantour" will be Dream Theater, Fear Factory, Dillinger Escape Plan and Nevermore. There will also be a second stage.

Gigantour raises the metal quotient on the road this year, joining the Clear Channel Entertainment-produced Ozzfest and House of Blues' Sounds of the Underground tour.

Final routing for Gigantour has not been confirmed, although it is expected to hit amphitheaters and arenas in major North American markets. Tickets will be about $35.

Megadeth will be touring behind its Sanctuary album "The System Has Failed," which debuted in September 2004 at No. 18 on The Billboard 200. Dream Theater will support "Octavarium," due June 7 via Atlantic.

Gigantour is produced by Mustaine, along with Benchmark Entertainment and the William Morris Agency. Keith Sarkesian is the responsible agent. Various promoters will work with the tour, according to Benchmark partner Kevin Gasser.