NTPerl (for New Technology Perl), but since Perl will keep going on, its better to numbering it like in the past and into the future: Perl 4, Perl 5, Perl 6, Perl 7, Perl 8, ... simple and easy!
Beside this, now we discuss an alternate name for Perl 6. Will we (or our descendants) want to have same discussions for Perl 7, Perl 8, ...?
Additionally, Perl never needed marketing and never will need it. Also, putting some effort or resources into marketing, requires sustainability. Will the Perl community keep with this?