Hip hop fans are still waiting for Kendrick Lamar and J. Cole to release their rumored collaboration album together. But the wait could still take a long time since both artists are busy working on other projects at the moment.

Lamar was recently featured in Sia's latest song "The Greatest" that came out Monday. The song was reportedly meant as a tribute to the victims of the violent shooting that happened in Florida's Pulse nightclub.

A video featuring the Australian pop star's favorite muse Maddie Ziegler was also released, but Lamar's inspirational verses like "letdowns will get you, and the critics will test you / But the strong will survive; another scar may bless you" are not included in the video.

Meanwhile, Cole has been making the news after he showed support for the protest of San Francisco 49ers' quarterback Colin Kaepernick against the oppression of black people in the U.S. He was seen wearing the quarterback's number 7 jersey as he took the stage to perform "A Tale of 2 Citiez" in front of a crowd over the weekend.

With numerous projects between them, the reported collaboration project between Lamar and Cole seems to have been pushed back for a little while longer. In a podcast interview with Rap Radar, Dreamville Records president Ibrahim Hamad hinted that the collaboration could still push through, but not in the nearest future.

"When he said that, we knew it was a stretch, but at the end of the day Cole is Cole and he knows what he's doing," Hamad said. "He has his way of getting things done and I think that at the end of it all, it will be way worth it...Whatever he had planned in February, whatever it is, it'll be way more worth it if people just like, know that he, he's kinda like a mad scientist with his thing. He's like a little mad scientist."