In 2004, Gainax marked their 20th anniversary with the production of Diebuster, the sequel to Gunbuster. Gainax's most recent successes on television have been the popular anime series Gurren Lagann (2007) and Panty & Stocking with Garterbelt (2010). In August 2011, Gainax was sued by A.D. Vision, which claimed Gainax's refusal to accept an option payment for the perpetual live-action rights to Evangelion was a breach of contract and had resulted in losing an opportunity to produce the film with a major studio. A.D. Vision has asked to be awarded the live-action rights to Evangelion and any accruing legal fees.
