The CW has released new trailers for the midseason premieres of Supergirl, airing Monday, January 23, and The Flash, airing Tuesday, January 24. The Supergirl trailer features a glimpse at Alex (Chyler Leigh) trying to convince the Daxamite Mon-El (Chris Wood) to suit up and go out in the field, even though he's afraid of what may happen. We also get a new look at Jimmy Olsen (Mehcad Brooks) suited up as The Guardian, plus the return of Veronica Sinclair, a.k.a. Roulette, along with a very interesting shot that ends this video footage.

The final moments of this trailer, courtesy of The CW, shows Kara Zor-El (Melissa Benoist) on a mystery planet with a red sun, which somehow causes Superman's cousin to start bleeding. Perhaps The CW will release even more trailers between now and the January 23 premiere to further explain just what is going on! Fans can also look forward to a musical crossover between both Supergirl and The Flash, but The CW hasn't announced when that will air quite yet.

The Flash trailer shows Barry Allen (Grant Gustin) telling Iris West (Candice Patton) that the future is changing, and that she saw Savitar murder her. Barry then reveals that he has to find out everything that happened in the moments leading up to Iris' death, and that if they can only change one of those events, they can change everything, including Iris' death. We also see Barry team up with Wally West (Keiynan Lonsdale), telling Kid Flash that they can change the future together. We'll have to wait and see what the future holds for these heroes when the hit series returns.

Related: Crisis on Infinite Earths Is the 2019 Arrowverse Crossover

At the end of last month, Supergirl and The Flash kicked off the four-night crossover event which came to be known as "DC Week." The Supergirl episode that started off this crossover was the show's most-watched episode of the season, with 3.5 million viewers, and matched its season premiere ratings in both adults 18-34 (0.9/4) and adults 18-49 (1.1/4). It was also The CW's most watched show in its Monday 8-9pm time period in more than eight years, since September 2008. It remains to be seen if Supergirl can keep this momentum going in the back half of the season.

The Flash's portion of DC Week drew in 4.09 million viewers, the show's most-watched episode in almost two years, since December 2014, and its highest rated episode of the season. The Flash episode drew a 1.2/5 in adults 18-34, its best rating in that demo since May, and a 1.5/5 in adults 18-49, its best since February. The Flash also posted a 3% increase in total viewers from last year's crossover episode, and a 7% increase in the 18-49 demographic. Take a look at the new trailers for Supergirl and The Flash below.