The team behind DC TV is working right now on a proper crossover for all four of its shows.

By 'real', we mean an actual four-night event this autumn where Arrow, The Flash, Supergirl and DC's Legends of Tomorrow are all integrated in one continuous storyline.

As awesome as last year's Invasion event was, only the last few minutes of Supergirl referenced the arrival of the invading Dominators and Arrow dipped out of the story for a trippy alternate timeline episode in the middle of the week.

The CW

The details haven't been worked out quite yet, but producer Andrew Kreisberg is telling Entertainment Weekly that his creative team are developing a more unified story for next time.

"Next year, we're hoping to do a true four-way crossover," Kreisberg revealed. "The great thing about our dear friends at the CW and Mark Pedowitz picking the shows up as early as they did has allowed us to start building the schedules for next season."

It was actually scheduling that stood in the way of all four shows pacing out the alien invasion storyline equally last autumn - something Kreisberg is working to rectify.

"The thing that we didn't really plan on - because we weren't aware that we were going to switch Supergirl from CBS to CW and it was really going to be part of it - that was the one show that didn't have built-in shut-down days, so all the other ones did," he explained.

"Melissa [Benoist] ended up being heavily in Flash and then in Arrow, so Supergirl was the one we needed to shut down the most and it was the one that we didn't have any opportunity to.

"Now that we've gotten the early pickup and we've started designing the seasons, we're building in those dark days, and actually more dark days on Supergirl than the other shows, to make it a little easier."

The CW

In spite of those minor critiques, the Invasion week was a huge hit with fans. Clearly, the DC TV faithful will be chomping at the bit for the next crossover.

To hold those fans over, Supergirl and The Flash will soon be teaming up for a two-night musical special as they battle the evil Music Meister - played by Melissa Benoist's former Glee co-star Darren Criss.

Those episodes will mostly take place in The Flash's world, but Martian Manhunter (David Harewood), Mon-El (Chris Wood) and Winn (Jeremy Jordan) from Supergirl's alternate universe will also make special appearances.

Supergirl kicks off the musical action on Monday, March 20 and The Flash takes over for Act 2 on Tuesday, March 21, both on The CW in the US. Sky1 airs both shows in the UK.

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