According to the Mainichi Shimbun, Gainax is contractually bound to pay royalties to Khara for projects Anno worked on, but Gainax now owes a large amount in back payments. Moreover, Khara made a special loan to Gainax for 100 million yen (US$877,636) in August 2014 and is now suing to get the unpaid amount back.
http://kotaku.com/hideaki-annos-studio- ... 1789592636