The TV series of Lucifer is a massive hit and with DC finally hitting a stride with a good film thanks to Wonder Woman - at least according to the leaks we’ve seen. Could we start to see some interesting crossovers between different heroes? We looked at the for and against. To give you fair warning. Things are about to get nerdy.

For a Lucifer Crossover

The Arrow

The adventures of Oliver Queen/Green Arrow was the first TV show in the DC universe to get real attention. It’s now in its fifth season with a sixth confirmed. It’s had a few characters appear from other shows including the Flash.

Ra’s al Ghul has also featured (played by Matthew Nable) who was the main foe of Batman in Batman Begins. Liam Neeson was interested in playing the role in Arrow but sadly couldn’t due to scheduling problems.

The Flash

The pilot of the Flash was the second most watched premiere in the history of the CW and has just been renewed for it’s fourth season. The Flash has regular crossovers with Arrow, as well as introducing a wider audience to Earth-2 (a parallel universe version of earth).

When the characters in The Flash travelled to Earth-2 they saw a picture of Supergirl (played by Melissa Benoist) as well as a version of the Flash from the 90s TV show. This was taken to imply that both those characters are in different universes, eventually called Earth-38.

Barry (The Flash) accidentally ends up in Earth-38 in a later episode, helping Supergirl battle two of her foes before going home. To make things even more complex The Flash appears in the trailer for The Justice League although he is played by Ezra Miller.

Supergirl

Kara Zer-El (Supergirl) has had, we think, the most crossovers so far in the two seasons it’s had. Superman made an appearance early on or at least his shadow did before being played by a real human with a face, in the shape of Tyler Hoechlin.

The Flash appeared in episode eighteen (mentioned above) which was more impressive when you consider that The Flash is on CW and Supergirl is on CBS. The episode was such a hit that it was repeated a few times with even more planned. The Legends of Tomorrow have also made an appearance.

Gotham has been mentioned in passing a couple of times which opens the door to Batman, or at least a window and of course J'onn j'onzz, the Martian Manhunter is in the Supergirl TV series.

Batman Vs Superman: Dawn of Justice

This was not a good film, but it did begin the process of kick-starting the DC film universe with multiple superheroes appearing at the same time. Joining Batman and Superman was the new Wonder Woman who made her first appearance played by Gal Gadot and stole the show.

The Justice League

This film hasn’t been released yet but from the trailer we’ve seen Wonder Woman, Batman, Superman, Aquaman, Cyborg and The Flash. This appears to be a separate timeline from the TV shows but at least we’ve got the characters working together.

From all of this we can see that DC are happy to have characters invading each other's’ stories, including bad guys. There is hope right? Well before you get too excited about everyone’s favourite fallen angel appearing all over the place let’s look at the arguments against a crossover.

Against a Lucifer Crossover

Fox

Lucifer on FOX. The Flash and the Arrow are The CW and Supergirl is CBS. A crossover between those is a little bit easier because CBS co-owns CW, but Fox is an entirely different entity.

It’s not impossible for characters owned by different companies to meet. Spiderman is licensed to Sony and he turned up in Captain America: Civil War which was produced by Marvel but it is more complicated because of lawyers.

No one else is special in Lucifer

Lucifer is self contained, at the moment at least. One of the main themes of the show is almost no-one believes Lucifer when he says who he is. People would be far less skeptical about Lucifer being some sort of super being if Superman were already flying around saving the world.

We’ve also not heard any hints of other DC super creatures, which is weird given how much fun The Arrow, Supergirl and The Flash have had dropping names.

The Vertigo Universe

The DC Comics universe is complicated, even before you get to Earth-38. Traditionally Lucifer and other ‘adult’ characters existed in a parallel universe called Vertigo.

This was where stories with more grown-up themes happened with Batman and Superman jumping about in a separate universe. This rule has been shaken up for special events like the Flashpoint storyline so it’s not impossible but then little is when it comes to superheroes.

Lucifer isn’t the only character from the Vertigo universe to make it onto TV. Preacher is also in the Vertigo universe, but it’s made by AMC so has the same complications as Fox.

We wouldn’t be surprised if DC already have wheels in motion for this. Given how much buzz there is about The Defenders and Spider-Man: Homecoming.