'The Flash' season 3 updates: Musical crossover with 'Supergirl' names a villain; show renewed for Season 4

A crossover of “DC’s Legends of Tomorrow,” Arrow,” “The Flash” and Supergirl” has already made TV history in 2016. Now, fans should be ready to sing and dance along as a musical crossover is about to air. This time, it features only “Supergirl” and “The Flash.”

"Glee" Veterans Bust Out Singing Chops For Current Superhero Roles

There have not been too many details about this unique project but one thing is certain -- Grant Gustin and Melissa Benoist would be coming together once again. Both actors are veterans of hit musical TV show “Glee.”

The events on this episode will be significant for both characters, writes Empire Online. Executive producer Andrew Kreisberg himself revealed that when fans see this musical stint, both Barry and Kara will find themselves at pivotal points in their respective plots. The experience of going through the musical will also have a strong impact on both series’ forward progression. What he means by this exactly we have yet to discover when it actually airs.

The villain has been revealed to be the Music Meister, who was first introduced in a 2009 episode of “Batman: The Brave And The Bold.” There, he was voiced by no other than Neil Patrick Harris, who has not been ruled out for a potential reprisal of the role.

The CW Announces Early Renewals

In other news, “The Flash” has secured a renewal for the 2017 to 2018 season, writes TVLine. The CW kicked off its appearance at the Television Critics Assiciation Winter Presss Tour with an announcement that “The Flash,” as well as six other shows, had earned early renewals. Others that were renewed included “Jane The Virgin,” “Arrow,” “Supernatural,” “Crazy Ex-Girlfriend,” “Supergirl” and “DC’s Legends of Tomorrow.”

Network producer Mark Pedowitz said that over the past seasons, The CW has built a schedule that has been based on proven performers. This holds true from its line-up of DC superheroes to some of their multi-awarded comedies and sci-fi dramas. Early pickups of these new series would allow their producers to plan ahead for what is about to come for the next seasons and give them a solid base with original content to roll out all year long.