Actress Fruzsina Cseh posted a photo from Hamilton’s wrap and included a title in the caption: Terminator 6: Phoenix. The site did some digging and discovered costar Enrique Arce also referred to the film as Terminator 6: Phoenix in an interview with lasprovincias.es.
As suggested by the site, this could be a working title – meaning it’s just the title they’re using during filming. We have confirmed that it is as such and not the official title. A phoenix is a bird that regenerated or is born again, which is a perfect analogy for a Terminator. This is a pretty cool title, except for it may be confusing opening near X-Men’s Dark Phoenix later next year on November 1, 2019.