According to Dan Harmon The Future of RICK AND MORTY is in Limbo

For those of you Rick and Morty fans who have been wondering what is going on with Season 4 and the future of the season, Dan Harmon has offered an update and it's not good. After a disgruntled fan complained to Harmon for not working on the new season of Rick and Morty, Harmon confirmed that Adult Swim hasn't officially picked up another season of the show yet. Here's what the fan tweeted to Harmon:

Then Harmon replied with the following:

It's strange and a shame that Adult Swim is dragging their feet on this. Rick and Morty is a wildly popular show! How have they not greet lit a Season 4 yet!? I don't have an answer for you. I'm just as confused as the rest of the fans. 

The first three seasons have been so freakin' funny and entertaining. I hope someone eventually pulls their head out of their ass to push Season 4 forward, but even if that happens, since no work has been done on it, it's gonna be a long ass time before we see any new Rick and Morty episodes. 

In the end, I'd rather wait for new episode than not have any new episodes at all. You can watch the "Run The Jewels" music video referenced above below: