Long running series need a US TV deal to become profitable. Most straight to DVD shows are never longer than 52 episodes.
For example, DBZ was on FOX Kids, then Toonami.
Naruto was on Toonami, then Disney XD
Dragon Ball Kai is on Nicktoons
And Bleach is on [adult swim]
Since Crunchyroll are going to release The Girl who leapt through time (I think) in the US, if it's profitable, they could hire another company dub the show and release it theirselves
If Crunchy can't do it, it's upto VIZ or Funi to convince [as] to pick it up =/