Today at 10am Pacific / 1pm Eastern, Apple will give a keynote presentation at the brand new Steve Jobs Theater, part of Apple's brand new Apple Park campus in Cupertino, CA. We will definitely see the 2017 versions of the iPhone, and we may also see a new Apple Watch, new Apple TV, and more. Apple loves to make surprise announcements, so anything is possible today.
It appears that, a few days ago, a rogue Apple employee tried to ruin some of the surprise by intentionally leaking some of the details of today's announcements. I cannot comment on the content of those leaks because I decided not to read the stories this past weekend. I think that it is more fun to see how Apple itself decides to announce its new hardware and software.
You can visit this page on Apple's website to watch a live stream of the event. If you cannot watch it live, Apple typically posts a recording of the video a few hours after the event.