As previously reported, Batista is scheduled to appear at SmackDown 1000 later this month alongside Triple H, Randy Orton and Ric Flair in an Evolution Reunion. According to Barnburner's No Hold's Barred Podcast, Batista's appearance may not be a one-off deal. It is speculated that the former six-time WWE Champion will sign a contract lasting through Wrestlemania. 

“Batista may be signing a short-term deal with WWE at Smackdown to possibly appear at Survivor Series, Royal Rumble, and WrestleMania.”

Batista has said in the past that he wants his final run in the company to culminate in a Wrestlemania match with Triple H. If this rumor proves true, it looks like "The Animal" will get his wish.