As usually, OnePlus is prone to hyperbole. They just shared a scheduled June 1st date for some big announcement. On top of that, they also claimed they are looking to "shake up the industry." Their Tweet specifically said,
We’re always looking for ways to shake up the tech industry. And we think it’s time for a change.
Of course, the event is likely to be their OnePlus Two reveal, which isn't really surprising. We are confident the phone will be impressive, but it hardly qualifies as an industry shake-up. Regardless, we are looking forward to seeing what they unveil. Even if it isn't quite the earthquake they make it out to be, the OnePlus Two is something fresh and exciting, which is a rare commodity these days in mobile.
Source: Google+ OnePlus