The design of the Mars 2020 rover Perseverance benefits from years of operational experience with Curiosity. While 2020's instrument suite differs in several ways it looks remarkably similar to Curiosity, at least to the untrained eye.
In terms of potential selfie capabilities (and not just what the first ones will look like), will anything be different?
From Space.com's 2020 Vision: NASA's Next Mars Rover Will Have Nearly Two Dozen Cameras:
A selection of the 23 cameras on NASA's 2020 Mars rover. Many are improved versions of the cameras on the Curiosity rover, with a few new additions as well. (Image credit: NASA/JPL-Caltech)