Having already confirmed that 'The Flash' Season 2 will return to the small screen from Oct. 6, now the team is teasing fans about the new villain in the upcoming season. In the finale of the first season of 'The Flash,' fans saw Barry Allen aka The Flash (Grant Gustin) fly into a wormhole with a view to save the Central City. Hence, the premiere episode of Season 2 has been rightly titled 'The Man Who Saved Central City.'

A report in Christian Today says that just prior to the San Diego Comic-Con 2015, 'The Flash' team was bestowed with a Saturn Award for the best superhero adaptation TV show. During the ensuing press meets Grant Gustin shared some details regarding the upcoming season of the show with reporters. He said that fans can expect a "big, bad" in 'The Flash' Season 2, in addition to confirming that he will also portray the scarlet speedster in the freshman series, 'Legends of Tomorrow.'

Referring to the new villain in the upcoming season of the series, Grant said, "A really cool 'big bad' that's going to be revealed kind of immediately." According to him, this new character is likely to be unveiled alongside the trailer for 'The Flash' Season 2 at the San Diego Comic Con in July.

The report suggests a few super-villains that may possibly be introduced in the upcoming season of 'The Flash.' They include Mirror Master, Doctor Alchemy, Killer Frost, and Blackstarr.

Doctor Alchemy: According to DC comics, Albert Desmond, a Central City police department's forensic lab director suffered from a split personality disorder. When Desmond's alter ego seized his brain, the lab director would employ his knowledge in chemistry in ways that were not approved by The Flash. Soon after, he finds the Philosopher's Stone that enables him to metamorphose any element.

Mirror Master: Similar to many other super-villains, Mirror Master was the pseudonym of two different baddies - Sam Scudder and Evan McCullough. Sam, the first Mirror Master, had initially employed the power of illusion to combat The Flash first, but later developed a technology to exploit the powers of mirrors to trap people inside them. At the same time, he also worked out a means to utilize mirrors to travel from one place to another. After his death, the mercenary Evan endorsed his identity as Mirror Master as well as his weapons.

Blackstarr: This super villain named Rachael Berkowitz has an exceptionally high IQ, and attained a PhD only at the age of 18. In addition, she mastered the secrets of the Unified Field Theory (also referred to as The Theory of Everything), with the help of which she gained mastery over the forces of the Universe.

Killer Frost: In the upcoming season of 'The Flash,' Caitlin Snow (Danielle Panabaker) is set to transform into her fatal alter ego Killer Frost.