The CW's DC Comics universe is about to get much bigger with the debut of DC's Legends of Tomorrow, which unites heroes and villains from both Arrow and The Flash with several new characters. As we get closer and closer to the Thursday, January 21 premiere date, USA Today has released a new trailer, which shows this unique group of future Legends travelling back in time to the year 1975. If that wasn't enough, The CW has also released a new promo that showcases the new Firestorm, Jax Jackson (Franz Drameh) and Dr. Martin Stein (Victor Garber).

In DC's Legends of Tomorrow, when heroes alone are not enough, the world needs legends. Having seen the future, one he will desperately try to prevent from happening, time-traveling rogue Rip Hunter is tasked with assembling a disparate group of both heroes and villains to confront an unstoppable threat - one in which not only the planet is at stake, but all of time itself. Can this ragtag team defeat an immortal threat unlike anything they have ever known?

DC's Legends of Tomorrow stars Victor Garber as Dr. Martin Stein, Brandon Routh as Atom, Arthur Darvill as Rip Hunter, Caity Lotz as White Canary, Ciara Renee as Hawkgirl, Falk Hentschel as Hawkman and Franz Drameh as Jay Jackson, with Dominic Purcell as Heat Wave and Wentworth Miller as Captain Cold. Based on the characters from DC Comics, DC's Legends of Tomorrow is from Bonanza Productions Inc. in association with Berlanti Productions and Warner Bros. Television, with executive producers Greg Berlanti, Marc Guggenheim, Andrew Kreisberg, Phil Klemmer, Chris Fedak and Sarah Schechter serve as executive producers. Glenn Winter directed the pilot episode, from a script by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg.

Related: Jonah Hex Arrives in Legends of Tomorrow Season 1 Finale Trailer

The show's main villain is Vandal Savage (Casper Crump), who fans first saw in the Arrow and The Flash crossover event that aired earlier this month on The CW. Other new characters who will debut on the show include Stephanie Corneliussen as the DC Comics character Valentina Vostok, a.k.a. Negative Woman, and another report from October revealed that the show is casting for Connor Hawke. In the Arrow comic books, Connor Hawke is Oliver Queen's son, although that aspect of the comics will be discarded for the TV version.

Just a few days before DC's Legends of Tomorrow will debut, The CW is airing a new special entitled DC's Legends of Tomorrow: Their Time Is Now on Tuesday, January 19 at 9 PM ET. The special features show clips and interviews from Legends, Arrow and The Flash executive producers Greg Berlanti, Marc Guggenheim, Andrew Kreisberg, Phil Klemmer and Wendy Mericle. Their Time Is Now introduces viewers to the immortal madman Vandal Savage, the time master Rip Hunter, and the motley band of heroes and rogues he assembles to try to save the future of humanity: Hawkman, Hawkgirl, White Canary, The Atom, Firestorm, Captain Cold, and Heat Wave. Take a look at the latest trailer for DC's Legends of Tomorrow, along with the promo showcasing the new Firestorm.