An atomic opportunity

Another crossover possibility would actually involve a spin-off "“ a spin-off based on yet another Arrow character (let's not forget that it was Arrow series which introduced Flash). And this character is Atom.

Of course, such a spin-off is long way from happening and depends on the trajectory of the character in the Arrow TV series. And not just in this one "“ since Atom's powers don't necessarily fit the tone of the show, this character will most likely move to Flash.

And if Atom will prove to be a popular character"¦

Is the sky the limit as far as crossovers are concerned?

No, not really "“ a crossover is a special event. It is a point/an episode in which two television series intersect. Making, for example, a crossover between Arrow and Flash more than once a year (as it was announced) would most likely decrease the audiences of the both shows "“ the characters and their development in itself won't count as much as it should, the focus shifting on what they can do together.

In other words, the fans will become more interested in these small story arcs of the crossovers, rather than in the characters themselves.

As a conclusion"¦

"¦ it can be said that we will definitely have one Flash and Arrow crossover a year, with Supergirl jumping into the fold as soon as the show lifts off.