I am eagerly awaiting the Dragon Quest VII remake for the 3DS and I believe that's the longest JRPG ever made.
AFAIK it is. At least it's the longest I've ever played, and I've played most of them. Even that, however, can be completed in the 60-80 range, probably even less if you keep the class grinding to a minimum.
I didn't even know there was going to be remake. I still haven't played DQVI (My favorite of the lot.) because my DS was stolen right before it came out, and I never bought another.