Not trying to be a troll, but is anyone else sick of the JRPG migration to the portables? I'm glad we're getting FFXIII soon, but the BULK of JRPGs this generation are on portables and aside from a few specifically designed for that purpose, it's far less comfortable playing a game for extended periods of time looking down at one (or two) small screens, with orchestral soundtracks muted by small speakers, and my large Gaijin hands cramping up from too much PSP/DS. I'd rather be relaxing on my couch with a JRPG playing on my LCD TV with surround sound.
If you want cheap development costs, do it on Wii. I'm just so tired of waiting so long inbetween JRPG console releases and even longer for good ones (only "A tier" JRPG this gen as far as I'm concerned was Lost Odyssey and that's debatable).
I think with the right design, a new Lufia could be a good fit for a portable system. Dragon Quest, Kingdom Hearts, not so much...