Appearing in "Ultimate Mystery (Part I)"
- Spider-Man (Peter Parker)
- Spider-Woman (Jessica Drew)
- Ben Grimm
- Invisible Woman (Susan Storm)
- Human Torch (Johnny Storm)
- Nova (Rick Jones)
- Captain Marvel (Mahr Vehl)
Races and Species:
- Wand of Watoomb
- Cask of Ancient Winters
- Ultron's Head
- Cosmic Cube
- Captain America's Shield
- Evil Eye
- High Evolutionary Armor
- Serpent Crown (?)
- Kree Uniform
Synopsis for "Ultimate Mystery (Part I)"
The personnel led by Wendell Vaughn at Project Pegasus awaits for Dr. Philip Lawson. Vaughn greets Lawson and grants him a tour of the Pegasus facility, where S.H.I.E.L.D. keeps all objects of mysterious or unexplained powers that the United States had accumulated over the years. Lawson displays some suspicions towards Vaughn, whom then questions Lawson as to why he is here. He explains to him that Carol Danvers had organized a task force to protect Pegasus in response to the attacks on Roxxon and the Baxter Building, in which he is placed to protect the facility. Again, Lawson displays some obvious and childlike strangeness to Vaughn, who then questions him again as to who he is. Lawson complies to Vaughn's questions and reveals himself to be Captain Mahr Vehl.
Meanwhile at the Triskelion, Susan Storm, Johnny Storm and a fully human Ben Grimm spend the night there. Susan inquires Ben of his transformation, which he had been checked several times by S.H.I.E.L.D. doctors who explained that his rocky form was a kind of chrysalis waiting for his actual powers to metamorphosis. He demonstrates his new powers as his entire body glows in a violet aura. Carol Danvers and Nick Fury enter and declare to the three that they are now recruited by S.H.I.E.L.D. to help on their investigation on the attacks.
Back at Pegasus, the facility's alarms detect an incoming unidentified object to which Mahr Vehl flies off and encounters head on, revealed to be Rick Jones. He tells Mahr Vehl that he has been sent by the Watchers to warn that 'destruction' is coming.
Now that the Ultimate Enemy has revealed his plan, the heroes of the Ultimate Universe search to discover their enemy's true identity before any more damage can be done. Join the Ultimate heroes on a chase that will take them all over the world and beyond! Superstar creator Brian Michael Bendis and artist sensation Rafa Sandoval continue to thrill in the next segment of the Enemy Trilogy!
- Rick Jones appeared last in Ultimate Comics: Spider-Man #8.
- Among the items in Project Pegasus's possession are Captain America's shield, an armor of the High Evolutionary, another version of Mjolnir, Ultron's head, and a Cosmic Cube.