Perl 6 is a completely different programming language and is generally unrelated to Perl 5 except in name, history, and a common group of comitters and users.

Perl 5 releases a new major version every year, and a new development version every month. So 5.16 will be around next spring, and 5.18 will be around the spring after that.

With thousands of users around the world, Perl 5 is not going away any time soon.