The OnePlus 7 may launch alongside some new variants for 2019 some time next month. However, if a new leak from PriceBaba is to be believed, it could easily be mistaken for its predecessor at its launch. This site claims that the 7 will have a teardrop-notched screen, a glass back and dual cameras - just like the 6T.
https://www.notebookcheck.net/New-exclusive-OnePlus-7-renders-look-suspiciously-like-the-6T.418082.0.html