The official WWE is teasing The Rock for tonight's Royal Rumble event from Philadelphia following The Great One's Instagram post earlier today. Below is what the article said:
"The Great One has a famed history with the Rumble event. He has headlined it and competed in the titular Royal Rumble Match multiple times, even emerging as the victor of said match in 2000. Is The Most Electrifying Man in Entertainment's presence in the City of Brotherly Love just coincidence? Could The Great One have business in Philadelphia beyond the Rumble, perhaps involving one of his upcoming blockbuster film releases? As the WWE Universe knows, the Royal Rumble Match is known for its surprise entrants and there would be no such appearance greater than the former WWE Champion, himself. Will we see The Rock appear as one of those possible surprises?
Or perhaps he has something else planned for the event if he does indeed show up? Does The People’s Champion perhaps have unfinished business with WWE World Heavyweight Champion Brock Lesnar that Rock will look to resolve live tonight in Philly?"
...It's practically a given that we will see The Rock at tonight's event.