Since I'm a huge fan of some animes & mangas I really wish some of it will hit blu-ray soon..
so anyway here is my list:
Bleach
it's a big action anime with 136 ep so far (still running) and 236 manga chapters
it airs with 4:3 ratio with no HD in sight, so it would awesome to watch it in full HD
and sony is one of its main sponsors
One Piece
It's a funny & deep adventure about pirates, so far it reached ep319 & ch466 after 10 years
the last 100 ep or so are aired in 720p HD so this one isn't hard to imagine in HD
Death Note
It's a great anime and one of the kind
It's only 37 ep and it's in 16:9 so it's not a hard job and will probaly take two 50GB blu-rays at worst