The next version of Android is currently known as Android O, but that's not the software's official name.
Android O has been in developer beta for a while, and the final version is expected to launch soon. We know this primarily because Google just launched a solar eclipse-themed teaser website that counts down to 21 August. The site does seem to be mostly about solar eclipse-tracking, but Google is also suggesting that the countdown represents when Android O will be officially revealed.
So, in other words, we could find out when Google plans to release Android O, or we might finally learn Android O's real name. It's unclear right now, but something is happening when the timer concludes on 2:40pm EST on 21 August. Keep in mind the last Android O beta release debuted in July, and at the time, we were told it was almost complete. Google has also promised a summer release before.