This evening Google teased shots of their new Pixel smartphone on social media after unofficial leaks.
From Google on Twitter
As we can see from the official image, the design of the back of the Pixel 4 has shifted away from what previous models look like. With the Pixel 4 having a square camera. We can also see that Google have removed the fingerprint sensor on the back of the device.
It's not clear how long we will need to wait until the official launch event. Leaks of other Pixels came out weeks, even months before it was announced by Google.