Following his departure from TNA, WWE reportedly had little to no interest in AJ Styles, however they might have changed their tune regarding the former TNA Champion.
Because WWE plans to have three touring brands by 2016, with NXT being one of them, the company wants to load up on as much talent as possible. Styles is currently the IWGP Champion in New Japan, and while he is reportedly content there, WWE is interested in signing him.
Source: Wrestling Observer Newsletter