This discussion has been had a couple times. It will not happen on CPAN itself. CPAN is and remains the Comprehensive Perl Archive Network — if nothing else, because that's all the mirrors volunteered to be.

However, just like search.cpan.org and rt.cpan.org are completely distinct from the CPAN itself, there is nothing stopping someone from setting up a forge.cpan.org or something like that. Except that so far, noone of those who suggested that there might be a need has actually gone through with it.

Personally, I'm not in opposition, but I don't see a particular need either.