Is an 'X-Men: Supernova' Movie Coming Alongside 'The New Mutants'?

It looks like a new X-Men movie may have been inadvertently/covertly/sneakily announced. While the film X-Men: The New Mutants has been a known quantity for a while, now there's evidence of an X-Men: Supernova. 

Production Weekly, which "provides professionals working in the film and television industries with the most comprehensive production breakdown available," recently published the title. Tracking site My Entertainment World also listed X-Men: Supernova on Wednesday, saying it'll film in Montréal in mid-May. The window overlaps with The New Mutants.