Samsung's next upcoming foldable phone may be called the Galaxy Z Flip. The prolific leaker Ishan Agarwal claims to have uncovered some more of its specs. It will apparently have a main screen measuring 6.7 inches. Furthermore, it may have a 12MP rear camera rather than the next-gen sensors predicted for the Galaxy S20 series.
https://www.notebookcheck.net/No-108MP-camera-for-the-Galaxy-Z-Flip-new-leak.450941.0.html
6.7" doesn't sound big enough to justify the technical challenges and costs of folding it in half, not to mention the thickness.