There had been reports over the last year that creator Howard Overman was working on a film that involved characters from all five series.
Thomas, Lauren Socha, Iwan Rheon, Robert Sheehan and Nathan Stewart-Jarrett were all tipped to feature in the film, but cast availability issues led to the discussions fizzling, reported Deadline.
"There was all sorts of talk about it. We read scripts and I think it's now not happening. I haven't heard anything. I think it's just difficult to get everybody together. Everybody is doing such different things," Thomas said