There have been rumors, and more rumors, and hints, and then a bunch of other rumors, and on September 9th we might have answers. Re/code reports that Apple will hold an event that Tuesday to announce the next line of iPhones, which we expect to include at least one, and probably two, new models. They'll have bigger screens, new processors, maybe new materials, and even more.
September 9th is a favorite day for Apple. In 2008, it unveiled a new lineup of iPods on that day; in 2009, it had its "It's Only Rock and Roll" event. There's lots of history on the date for Apple, for its music in particular – of course, it's all tea leaves, but the company does have a history of making cryptic statements with every aspect of its events.