As great as this lineup is, I think the regular Megadeth/Iron Maiden show would be better. For one thing, every band on this lineup except for maybe Sabaton tours North America often, so it isn't difficult to see them. Testament and Anthrax are already known for their inability to make interesting sets when they headline, so this makes their problem worse. Megadeth and Maiden are really the only two bands with decent length setlists, but I'd have to imagine that by the time they came on, a lot of people would be quite tired.
9/6 - Crimson Shadows CD Release Party
10/10 - Sabaton/Amon Amarth (?)
10/17 - Satan
10/18 - King Diamond