This all comes from a video that The Rock uploaded to his Instagram.
The Rock Is The Foundation?
As pointed out by @bnwkr on Twitter, The Rock's video from March 16 talks about a "really big day" for him.
He then goes on to finish the video by emphasising the words "The Foundation," raising a signature eyebrow at the camera, and tagging the post with the character's name.
He doesn't really explain what "The Foundation" is about, but it ties in very well with the Fortnite Season 6 launch, and you'll definitely notice that the Foundation sounds familiar if you watch the trailer again.
Ben also asked Epic about it, but says they refused to comment.
It was also revealed by Variety that The Russo Brothers, of Avengers directing fame, directed the Season 6 trailer.
Therefore, having another Hollywood superstar as part of the new season wouldn't be much of a surprise.
Also, if you look at the two images side by side below, The Foundation's design looks a lot like The Rock and his famous tattoo.
Of course, this could still all be coincidence, but that's unlikely at this point. We'll be sure to let you know if the theory is confirmed or debunked as we get further into Chapter 2 Season 6 of Fortnite.