Well, this is unexpected. According to Dave Meltzer, there has been talk within WWE about The Rock being interested in making a return to the squared circle at WrestleMania 35. There's been speculation about him coming back to WWE ever since he recently revealed that he can't wait to step back inside the squared circle, while Elias calling him out definitely got fans talking.
The only way The Rock could return at WrestleMania is if he has no scheduling conflicts with his Hollywood career and the movie studio he's working for at the time is happy for him to wrestle and aren't worried about insurance issues and potentially having to delay start of production because he's injured. It's a tricky situation, especially as Hercules was delayed because he needed surgery.
If we're going to see The Rock back in WWE, he could make his return on Monday as RAW hails from Miami. However, it's highly unlikely that they'll tease a WrestleMania match that soon.