"Legends of Tomorrow" stars will be up against "Legion of Doom." The "Legends of Tomorrow" cast and crew, which consisted the show's panel during the San Diego Comic-Con 2016, confirmed the upcoming show spoiler.

The "Legends of Tomorrow" announced during the SDCC panel that the second season will have the "Legion of Doom." With the latter joining in, the show will have villains like Malcolm Merlyn, Damien Darhk, and Reverse Flash.

"Legends of Tomorrow" Marc Guggenheim, executive producer of the show, said during the event that they have created the perfect team of antagonists for "Legends of Tomorrow" heroes. "Legends of Tomorrow: Legion of Doom" is a combination of "Arrow" and "The Flash" deadliest enemies, TV Line reported.

"Legend's of Tomorrow's" Guggenheim said that the "Legends of Tomorrow" Season 2 will revolve around the crews love for the challenge of the superfriends and incorporated that into their "Legion of Doom." The "Legends of Tomorrow" panelists also revealed other members of the "Justice Society of America," Coming Soon reported.

The show "Legends of Tomorrow" will then introduce heroes like Hourman, Stargirl, Obsidian, and Dr. Mid-Nite. For those who are unaware of these characters, Stargirl is a young hero with superpowers. Obsidian is the son of Green Lantern and Dr. Mid-Nite is a crime fighting physician coming on the "Legends of Tomorrow" Season 2.

"Legends of Tomorrow" Season 2 will bring these characters to life, but in their own versions. The fans will just have to be updated for possible introductions of these heroes.

Meanwhile, "Legends of Tomorrow" characters Rip Hunter, the ATOM, White Canary, Firestorm, Heatwave and Captain Cold will not appear on "Legends of Tomorrow" regularly. Instead, these beloved heroes of "Legends of Tomorrow" signed a deal with Warner Bros. TV to allow them to appear across the DC universe series as "Legends of Tomorrow" will introduce new characters.

"Legends of Tomorrow" is a show included in the DC universe created by Greg Berlanti, Marc Guggenheim and more. "Legends of Tomorrow" Season 2 will launch its first episode on Oct. 13. Watch the "Legends of Tomorrow" 2016 official trailer here.