The Marvel Legends line was originally intended to be a spinoff line from Spider-Man Classics, but soon became widely popular and massive in span. 16 series were made by Toy Biz, and in 2007 Hasbro bought the Marvel license, producing the line for a few years before production was halted. The line returned in 2012 under the label "The Return of Marvel Legends."

When Hasbro took over the license in 2007, they started right away including new Build-A-Figures. Series 1 contained Annihilus, 2 contained Blob, 3 contained the Brood Queen, and 4 contained Holocaust and so on ...