What's Going On With Epic Rap Battles of History?

Epic Rap Battles of History, one of the most popular channels on YouTube, offers comedic videos where cultural and historical figures engage in verbal feuds. The two masterminds behind the series are Nice Peter and Epic Lloyd.

ERB has featured celebrities such as: "Weird Al" Yankovic, Snoop Dogg, Jenna Marbles, and Chali 2na. The show's crew has even visited the Oval Office.

ERB Season 3 just ended with Renaissance Artists battling the Teenage Mutant Ninja Turtles. Since then, there hasn't been much activity from the humorous rappers. But they are teasing fans about what is to come in the future.

On September 3, Epic Rap Battles of History tweeted,"Who's Next?". A reference to the question asked at the end of every ERB video, suggestions were given from across cyberspace.

Today, Epic Lloyd posted via Twitter that he was heading to "The Source" with Nice Peter. When another Twitter user asked what The Source was, Lloyd responded that it was the Youtube Headquarters in San Francisco.

With ERB's massive popularity and its current break between seasons, what could be the nature of Lloyd and Peter's visit to the Youtube headquarters?

It is possible that something is happening with the show, given the recent activity on social media.