2018 is definitely the year of the at-least-three-camera phone. Some upcoming devices may have even more. However, Google seems content with the single rear shooter it has incorporated into the new Pixel 3 series.
https://www.notebookcheck.net/In-a-world-of-multiple-rear-smartphone-cameras-Pixel-3-XL-sticks-with-one.337794.0.html
If they at least retain Pixel 2's superior texture and resolution, AND manage a great boost in low light merge capabilities, then they've certainly got a winner.