Although DC Comics is focused on the Justice League of America, they will be introducing the Justice Society of America, which is the first ever superhero team published in comic books, the "Legends of Tomorrow" boss said.

"For comic book fans, everyone knows the Justice Society is really the precursor to the Justice League, so it's a pretty big move," executive producer Marc Guggenheim told The Hollywood Reporter.

During the Thursday episode of the Legends of Tomorrow, it was revealed that Rex Tyler aka Hourman played by Patrick J. Adams will be joining the Arrow/Flash spinoff, along with the Justice Society of America.

Comic book fans surely knows that the Justice Society is the precursor of Justice League and their move to DC TV would be something really huge.

Season two for the Legends of Tomorrow will be totally different with the introduction of JSA and Hourman. And of course, we will no longer see Captain Canary since his character was killed off and it was announced by EOnline that his role in the show is officially over. Aside from that, there will also be casting shakeups and the Time Council will be eliminated.

Guggenheim also teased that the villain of season two is not the Thanagarians but is something totally different.

" All I'll really say about the nemesis in season two is Vandal Savage looks like a walk in the park compared to what the Legends will be facing. This will be a much, much bigger threat. I'm going to leave it at that because when we do reveal it, it's going to be pretty big. People will be asking, 'Vandal who?' once they get the full picture of what our team is up against. It's going to be way bigger than what you can even imagine, I can guarantee it," Guggenheim said.

The Justice Society of America (JSA) was first introduced in the All Star Comics #3 of 1940 but it was only in 1961 during the Silver Age of comics that it was retooled as the Justice League of America. Since then, JSA is known as a super hero group from Earth-2 while the Justice League of America is from Earth-1.