By the time it's finished D3 will be around and it could be used for it. A committee can formed to decide what to include and to design the structure of the library. Anyone can submit code.
That's how it works now, committee and stuff is in place: http://wiki.dlang.org/Review/Process it wasn't always like this, but it is now. What lacks is the actual effort spent to write the actual code, that can pass the review.
