There are a number of franchises I want to see come back where I'm probably one of several thousand. I'll mention two.
There might be a sizable audience who wants it back in Japan, but not elsewhere:
Siren. The first two are truly amazing, quality horror games. They also seem to have been shunned in the western world, especially within the context of a certain Resident Evil game (iirc, a number of European reviews of Siren 2 lamented the fact that it wasn't more like a game that barely made any pretense of attempting at a horror experience). They're also difficult, feature a Japanese cast, can be clunky, intentionally obtuse, and turned off Americans with a mixed bag of British VA in the original.
And very much, dead in the ground to the point where even an HD collection isn't feasible:
Xenosaga. I think the franchise deserves to come back due to the sheer fact that absolutely nothing in the industry has attempted a JRPG at this level of ambition (Kiseki might be worth a mention), but of course, it's completely impossible. Why am I largely alone? After the second title, a lot of people grew cold to the games. The first game also turned quite a few people off, resulting in the sales drop. I guess it just wasn't meant to be. I liked Xenoblade quite a bit more than I thought I would, but I don't think it can replace this series.