The X-Men's cinematic universe may have just grown by one more feature film. A number of X-Men movies are either on the way ("Logan"), about to start production ("Deadpool 2" and "New Mutants") or on the way ("Gambit"). New listings on a few production websites, however, have added another title to the list of X-movies that are in the works: "X-Men: Supernova."

The working title has apparently been circulating since mid-December, but back then it was believed to be the working title for "The New Mutants" film. However, A recent installment of Production Weekly listed the aforementioned "X-Men: Supernova" along with "X-Men: The New Mutants," thus indicating that they are two separate movies.

While official word has yet to be given by Fox, a second website -- My Entertainment World -- also listed both "New Mutants" and "Supernova" as X-Men films that are in production. According to that site, "New Mutants" is slated to begin production in Montreal in late April while "Supernova" will begin production in Montreal in mid May.

While there's no official word from Fox about a direct follow-up to 2016's "X-Men: Apocalypse," there are other rumors that seemingly corroborate the existence of "X-Men: Supernova." There's been a report that an X-Men film is slated to begin production in May, which is when "Supernova" is reported to start. Additionally, all the teases dropped about the "Apocalypse" follow-up hint towards the X-Men going to outer space for a retelling of "The Dark Phoenix Saga." "Supernova" could easily be a cosmic codename for a "Phoenix"-inspired story.

"Supernovas" was also the title of a 2006-07 story that played out in "X-Men" #188-193. That storyline by Mike Carey and Chris Bachalo put a team of X-Men led by Rogue up against the powerful Children of the Vault. This is most likely a coincidence, though, and it's highly unlikely that an X-Men film would be based on a relatively obscure storyline. It's more likely that "Supernova" is a codename for "Dark Phoenix" since that storyline's already been hinted at.

The next film in the "X-Men" film franchise is "Logan," Hugh Jackman's final outing as Wolverine. That film opens on March 3. Additionally, "New Mutants" and "Deadpool 2" are slated to begin production soon, although neither has a release date yet. "Gambit" starring Channing Tatum has been in the works for a while, but has been plagued with director problems. The film has yet to find a new director following the departure of Doug Liman in August.

(via Comic Book Movie)