Maybe not impossible, but I doubt BEI will ever pitch anything with the Gundam label until 00 is completely over. Maybe not even then, given what happened when they aired MSG after Gundam Wing. Unfortunate but true.
If they were to license and dub the movie trilogy, though...probably a dream, but I wish that they would.
Hell, CN's broadcast rights to Wing are probably over...I don't know. I'll be surprised if anything before 00 gets aired, to be honest. But I could be very wrong.
I would say PlanetES, but they put that on their Imaginasian block. Outlaw Star and Crest of the Stars are two choices that would be good as well as realistic.
Outside of Bandai...given the whole "SyFy" thing and what Rave Master clearly is, well, there's no logical argument I can make anymore for why One Piece shouldn't be on this. So whenever CN drops the rights (if they haven't already) it could be an option. The rights issue could be the problem though--Funi may not want to cede any to Starz. Then again, maybe it's really up to Toei.