The latest updates and spoilers for "The Flash" Season 4 reveal the live-action version of DC villain Amunet a.k.a. Blacksmith. The latter will hunt down Caitlin Snow, Iris West, and Felicity Smoak during their girl's night out in Episode 5.

Comic book fans want to know if the CW Network plans to add Batman into the "Arrowverse" after Oliver Queen named dropped him in the previous episode of "Arrow" season 6. Elements of the Dark Knight have been used in the DC TV series and it may not be long before the producers decide to put their version of Bruce Wayne in the show.

'Girl's Night Out' synopsis

The plot of episode 4 will feature Felicity Smoak coming over to Central City to help Caitlin Snow celebrate Iris' bachelorette party. However, Caitlin receives an ominous threat from her former boss, Amunet, that will expose her activities as Killer Frost, and ruin her chances of staying with Team Flash.

Meanwhile, Cisco Ramon, Joe, and Wally West have their own plans to celebrate Barry Allen's bachelor party before the big wedding day. "Battlestar Galactica" star Katee Sacknoff has been cast to play Amunet in the TV series, and her character is the kingpin of an underground metahuman syndicate. She has the ability to control and manipulate metal similar to Magneto.

Barry and Iris' wedding day will also set up the events for the "Crisis on Earth X" crossover wherein the evil versions of Supergirl, The Flash, and Prometheus invade Earth 1. Several behind-the-scenes photos revealed that evil Flash is Harrison Wells, Green Arrow vs. Prometheus X, and more.

The DC TV heroes must work together with The Ray and his Freedom Fighters to stop the Earth X army from taking over their home.

Batman in the 'Arrowverse'

It was during episode 2 of "Arrow" season 6 that Stephen Amell's character, Oliver Queen, name-dropped Bruce Wayne during his speech denying his identity as the Green Arrow. Amell told Entertainment Weekly that he was excited about revealing the "coolest" DC character on the show, and how it will make a huge impact on the "Arrowverse."

Batman characters like Ra's al Ghul, Talia, Nyssa, Cyrus Gold, Anarky, and Prometheus were used in the show, and there have been numerous easter eggs regarding the Dark Knight in "The Flash," "Supergirl," and "Legends of Tomorrow."

The "Arrowverse" producers already featured Superman in the "Supergirl" TV series, so it will be interesting to see Bruce show up in Star City and meet Oliver in person.