Whereas Marvel Studios could barely wait until the end of the first Iron Man movie to announce to the world that it would be bringing comic book-style shared-universe continuity to movies (and TV) for the first time, Warner Bros and DC were comparatively more muted when it came to their so-called "Multiverse" approach to their multimedia properties - talking about it only sporadically before surprising TV audiences with the reveal that not only would the Infinite Earths be showing up on The Flash, but that the (previously unrelated) CBS series Supergirl was part of it as well.
Now, we have the first official teaser for the Supergirl/The Flash crossover fans have clamored for (see above). The preview also formally confirms a March 28th airdate for the anticipated episode.
While internet fans who are already well-aware that the crossover is taking place may feel disappointed by the lack of footage revealed in the teaser, which features only the briefest meeting exchange of glances between Kara Zor-El (Melissa Benoist) and Barry Allen (Grant Gustin); preceded by an animated graphic of the electric yellow energy trail signifying the presence of The Flash moving around the borders of the Supergirl symbol. However, the teaser is clearly aimed less at devoted fans and more at casual viewers (Supergirl airs on CBS, which draws a larger but also less "appointment viewing" set of demographics) for whom this may be their first indication that it was taking place.
The episode, titled "Worlds Finest" in reference to DC Comics' flagship "superhero team-up" book of the Silver Age, finds The Flash accidentally stranded in Supergirl's universe just in time to be waylaid by a battle with two supervillains. According to the official synopsis:
“Kara gains a new ally when the lightning-fast superhero The Flash (Grant Gustin) suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.”
Fans will likely be interested to see what effect the encounter has on both characters, both in the episode itself and also long term. Unlike the traditional DC Comics conception of alternate-Earths, where analogs of the major heroes tend to exist from world to world, Barry's Flash hails from an Earth where neither Supergirl nor Superman seem to exist (or, if they do, they're not being public about it.) Likewise, apart from Kara herself and her more famous cousin, there do not yet appear to be many other superheroes on Supergirl's Earth - apart from herself and Martian Manhunter. Barry especially has seen plenty of strange things since becoming The Flash, but beings as powerful as Kryptonians are beyond anything he's encountered, friend or foe, thus far.
The use of these two characters in particular to kick off DC's first crossover between networks is an interesting one given the character's respective histories with interdimensional travel in the comics: The concept of The Multiverse originated when Barry Allen's Flash met his Golden Age counterpart Jay Garrick in the 1960s, whom he had previously only known as a comic book character in his world. On a darker note, both Barry Allen and Supergirl were among the most notable characters to die in Crisis on Infinite Earths, the landmark 1980s maxiseries that (for a time) collapse the Multiverse into a single entity. While World's Finest likely has big implications for DC properties going forward, it's unlikely that either character will meet that particular fate just yet.
Supergirl airs Mondays @8pm on CBS. The Flash returns with ‘Trajectory’ on March 22nd @8pm on The CW. Arrow returns with ‘Broken Hearts’ on March 23rd @8pm on The CW. Legends of Tomorrow will return with ‘Left Behind’ on March 31st, 2016 at 8pm on The CW.
Source: DC Entertainment