Circle Of Four
Sees Flash Thompson arrive in Las Vegas for the beginning of a special 6-part story line guest-starring Ghost Rider, Johnny Blaze, the Red Hulk and X-23. The story line was inspired by Walt Simonson and Art Adams' "Fantastic Four" arc from the early '90s which saw Spider-Man, The Hulk, Wolverine and Ghost Rider coming together to briefly form a new incarnation of the FF.
The big reveal that he uncovers is that Vegas is the site of a power struggle taking place between Mephisto and Blackheart for control of Earth