The Flash season 6 premieres soon, and the CW has released a new trailer for fans to check out. The Flash has been a key part of the Arrowverse since the show premiered in 2014. Though the shared world has gone on to include SupergirlLegends of Tomorrow, and upcoming series BatwomanThe Flash is the show that turned Arrow into a 'verse. Since its first season, the show has focused on a family dynamic, from Barry's relationships with his adoptive father Joe and eventual wife Iris, to his friendships with everyone at Star Labs. Once Arrow completes its run early next yearThe Flash will be the longest-running DC show on The CW.

As new seasons begin for the Arrowverse shows, all eyes look ahead to the Crisis on Infinite Earths crossover. It will air in December of this year and January 2020 and include all 5 Arrowverse shows, plus Black Lightning. Crisis on Infinite Earths will have a big impact on season 6 of The Flash. The Monitor, a key character in the crossover, will appear in the season 6 premiere. At San Diego Comic-Con, The Flash himself, Grant Gustin, said that, "The Monitor shows up at the end of our first episode and says the universe is in jeopardy and in order to save the universe, Barry Allen has to die." Additionally, showrunner Eric Wallace has said that Crisis on Infinite Earths will affect the entire season of The Flash, rather than being standalone event.

Related: Crisis On Infinite Earths: DC Comics Crossover Explained

The CW released the new season 6 trailer earlier today. At the start of it, Barry's heard saying, "I saw billions of possible futures. Billions of deaths," possibly due to what The Monitor may show him in the premiere. Barry's upset by what he sees, but Cisco and Iris both reassure him they can fix it. The trailer also offers a brief peek at yet another new character for Tom Cavanagh, who has previously played villain Eobard Thawne and versions of Harrison Wells from different Earths. The crossover also gets a shout out, with Barry explaining, "I have to prepare the team for this crisis." Check out the trailer for The Flash season 6 below:

Though the crossover is a big part of The Flash season 6, The CW has made other announcements about the season as well. The main villain is Bloodwork, a scientist with ties to Caitlin Snow. Wally West will make his return, after leaving the show as a series regular in season 4. Set photos showed that Barry will battle Godspeed and get a new super suit. Additionally, Candice Patton, who plays Iris, left fans speculating last week when she revealed that she'd shot one of the grossest scenes she'd ever done.

However, despite everything the characters will face in season 6, the new trailer shows just how big of an effect Crisis on Infinite Earths will have on The Flash. Though Barry's disappearance was always likely to play a role, his reference to "Billions of deaths" suggests that there's even more at stake. Though Iris and Barry are still mourning their daughter Nora vanishing from the timeline, they may have to set aside their grief to save the world. The Flash is usually a good blend of comedy and drama, but the serious tone of the trailer means fans may be in for a heavy season. At the very least, the start of The Flash season 6 will only make them more excited for Crisis on Infinite Earths.

Next: Crisis On Infinite Earths Can Give Smallville The Ending Fans Always Wanted

The Flash season 6 premieres Tuesday, October 8 on The CW.

Source: The CW