WATCH: The Flash Season 2 Trailer

After an exciting first season, Barry Allen, aka The Flash (Grant Gustin) has a lot more to worry about than other "meta-humans" who also gained powers during the same events that gave him super speed.

In the second season trailer it's revealed that they'll be facing foes from outside our world, and of course they want The Flash dead.

These otherworldly crossovers will likely lead up to the introduction of Hawkman and Hawkgirl, two famous heroes from the DC Comics universe that will play a big part in the new CW series, Legends of Tomorrow.

Watch below.