I'm sure
20th Century Boys will happen once it's done, and I have no doubts that it will be fansubbed. If there are still fansubbers around, that is
I would like to see a
+Anima series. It would fit nicely into 13 episodes, I think, and it'd be a lot of fun. I don't think anyone else would, though. Very few people know anything about it.
666 Satan and
Black Cat would both be amazing, but I'm afraid they'd become worshiped by the next wave of Naruto fans, because of the great action and long length. Satan is by Naruto's mangaka brother, too... so I think I prefer them in manga, at least 666, so that they won't turn out like Naruto did
Still a good series, but look what's happened among the fans...
Happy! would be nice. It's already finished and it's an Urasawa title, so maybe we'll see it...
I would love a second season of
Hellsing that followed the manga storyline.
Oh! I almost forgot
Bleach and
Zombie Powder. Those would definitely be amazing as well, especially ZP.