The former would depend on 4kid's willingness
to license the movie, as they seem to be more reliant on the original
Yu-Gi-Oh! anime and may possibly see 5D's as a non-worthwhile investment
(The original NAS/Studio Gallop anime has been consistently scoring
higher ratings on CW4kids, 4kid's mainstream kids block, then 5D's was
doing at all.). It also depends if they have any money or capital from
which to silence the movie. For people not realizing it, 4kids basically
lost a huge amount of money in the last few years, and due to the
collapse of Lehman Brothers, a major financial firm, lost an insanely
huge double-digit millions cushion of money they could of relied upon
from their silences not succeeding. With that out of play, they have to
be more careful and conservative of the franchises they deal with.
And the licensing thing for this could potentially be insane, and 4kids,
due to getting kicked so hard, just might not have the money available
to license this movie, especially if their Japanese partners demand a
Theatrical Release in the international markets 4kids has stake in.
Asatsi-DK, Konami, and Shueisha were probably able to foot the bill for
the movie if they all had a hand in it, since they're relatively biggish
firms/companies/conglomerates in their home turf for what they do,
but... 4kids?
It really depends on them ultimately, and if they consider it a good investment and they have the money to shell out for it.
As for a release date, DVDs generally take 3~9 months to release, I
believe, for Theatrical movies and Season Sets in the US, but I'm not
sure about Japan (Though I'd expect it to be similiar there.)
-----
As to the movie.
Concerning Darkness's vision to the future and Paradox's future being
the same, I expect either Juudai or Paradox will need to confirm it.
>.>; And even then, I expect them to entirely skirt the issue.
They'll imply it back and forth, most likely, and I wouldn't be
surprised if Darkness was an inspiration for Paradox's time, but...
it'll more likely be a silent head nod in my opinion.
Unless they release a "TOTAL FAX GUIDEZ" for the movie or YGO in general, like an Ultimania guide. (Ha ha, yeah, I wish.

)