So, I went to an RPW show last night in London. In the main event, AJ Styles lost the championship to Zack Sabre Jr., in what is supposedly his last indy match. After the match, he cut a promo where he hinted that he could be involved in the Royal Rumble match. It could just be a tease. But it could not. Right now I'm taking it with a grain of salt but it would be awesome if true.
EDIT: Found a link to an article about it, which includes a video of his promo.
http://www.wrestlezone.com/news/663213- ... mble-match