 The 1990s saw the rise of variant covers, cover enhancements, swimsuit issues, and company-wide crossovers that affected the overall continuity of the Marvel Universe.Marvel suffered a blow in early 1992, when seven of its most prized artists — Todd McFarlane (known for his work on ""), Jim Lee ("X-Men"), Rob Liefeld ("X-Force"), Marc Silvestri ("Wolverine"), Erik Larsen ("The Amazing Spider-Man"), Jim Valentino ("Guardians of the Galaxy"), and Whilce Portacio ("Uncanny X-Men") — left to form Image Comics in a deal brokered by Malibu Comics' owner Scott Mitchell Rosenberg.Three years later Rosenberg sold Malibu to Marvel on November 3, 1994, who acquired the then-leading standard for computer coloring of comic books (developed by Rosenberg) in the process, but also integrating the Ultraverse into Marvel's multiverse and ownership of the Genesis Universe.