During the final verse of Royce Da 5'9"'s new song, Caterpillar, Eminem appears to shout out the Canadian battle rap league, King of the Dot. Eminem's verse starts off at the 2:45 mark and the KOTD rhyme structure starts around 3:30.

"Say what I think when I rhyme, in ink-pen I talk
And the language I speak is my mind
Kingpin and Penguin combined
Spit like it's King of the Dot
A singular thought I'd think I would help you distinguish your bomboclat from the cream of the crop"
- taken from Genius.com

The song will be available on Royce's album, The Book of Ryan, set to be released on May 4th.