The Chinese telecomms regulator 3C has just cleared a phone called the Samsung SM-G9880. This phone is currently thought to be the Galaxy S11+, a potential 2020 ultra-flagship phone. If so, it will ship with a 25W charger and support 5G.
https://www.notebookcheck.net/The-Samsung-Galaxy-S11-may-be-close-to-launch-with-new-certification.448621.0.html
IMO by now a charger that takes only one cable is quite useless, who doesn't have a bunch of run-of-the-mill bundled chargers lying around, especially somebody buying a flagship? You either already have a PD charger that goes above 25W(with 2-3 ports, total output >50W), or you should buy one that nobody is going to bundle anyway.