2000s
In 2000, Frank worked on various assignments for both DC and Marvel, including issue No. 7 of Tom Strong under DC's America's Best Comics imprint and writing and penciling a two-page X-Men story in X-Men: Millennial Visions, his final collaboration to date with inker Cam Smith. Kin, a six-issue miniseries created, written and penciled by Frank, was published under Image's Top Cow imprint.[4] The story tells of a secret government agency named S.I.A. who discovers that a race of neanderthal men exists in the mountains of Alaska and proceed to eliminate them to obtain their technology, which developed differently from that of the rest of the world. The book's protagonist, S.I.A. agent Trey McAloon, is opposed to the agency's plans and confronts them about it, while the book's other main character, Alaskan Park Ranger Elizabeth Leaky, establishes contact with one of the neanderthals.
The miniseries' conclusion was open-ended, with questions left unanswered, but so far no sequel or continuation of the story has been announced. The trade paperback collection of Kin entitled Kin: Descent of Man includes six pages of additional story that were not featured in the original issues.
In 2000, Frank began his first collaboration with J. Michael Straczynski, the television writer and creator of Babylon 5. Frank served as penciller on Straczynski's Midnight Nation,[4] a 12-issue limited series published by Top Cow from 2000 to 2002 under their now-defunct Joe's Comics imprint. The first issue of the series included a five-page interview with Frank and Straczynski. One of the inkers on the series was Jon Sibal, with whom Frank would begin a long-running artistic collaboration that continues to this day.
On 16 July 2002, it was announced that Frank had signed an exclusive contract with Marvel.[9] His first work under this contract was a two-issue story arc on The Avengers issues No. 61–62, written by Geoff Johns and inked by Jon Sibal. In 2003, Frank re-teamed with Straczynski on Supreme Power, a revamp of Marvel's superhero team Squadron Supreme,[10] published under their mature-audience Marvel MAX imprint. With its realism and mature storytelling, the series became Marvel's first MAX title to sell over 100,000 copies, making it their best-selling mature-readers series of all time.[11] The series ran for 18 issues from October 2003 to October 2005.
During his run on Supreme Power, Frank provided covers for a diverse number of Marvel series such as Silver Surfer No. 7; Wolverine/Punisher No. 2; The Incredible Hulk No. 75; issues No. 4 and 6 of the Supreme Power spin-off miniseries, Doctor Spectrum; The Amazing Spider-Man No. 515 and 517; Black Panther No. 10; and numerous others, as well as two pages of interior art for the Avengers: Finale one-shot.[3]
On 10 May 2007, having worked several years on a Marvel exclusive contract, Frank signed a new one with DC Comics. He served as the artist on Action Comics with writer Geoff Johns.[12] The creative team produced the "Brainiac" storyline in which Superman's adopted father Jonathan Kent was killed.[13] Frank and Johns continued to work on Superman in the Superman: Secret Origin six-issue mini-series. The story features what Johns and DC Executive Editor Dan DiDio called a "definitive" telling of the origin story of Superman, dealing with his life in Smallville, his first adventure with the Legion of Super-Heroes as Superboy, and his arrival in Metropolis and at the Daily Planet.[14][15]