I heard a lot of buzz about C++17 and C++14 even when C++11 was rolling out.
But now I understand that C++17 is on track to deliver (without Concepts) in the Fall of 2017, but I'm still not sure what the following standard is.
I've heard C++21 kicked around. Is that accurate?
Update: C++20 did become the next standard after C++17 and C++23 is set to be the next version after C++20.
Looking as ISOCPP we see
Which shows that at least right now, C++20 is the name they are using.