According to this link:
https://www.bbc.com/news/health-45983320 there is the possibility of a new antibiotic within the next few years. I quote: "The drug, made by Shionogi Inc, acts like the Trojan horse in Greek legend to trick bacteria into allowing it to enter." It is in early human trials but it is still a few years away from production. Instead of the wooden horse it uses 'iron' to trick the bacteria past its defenses.
Without new antibiotics they made this prediction in that article: "The Review on Antimicrobial Resistance made stark predictions for the future, including 10 million people dying every year from drug-resistant infections by 2050." Hopefully new technics, like this one, can work against other bacterial infections.