This list won't include licensed games due to their licenses may expired today. This also exclude remasters and re-releases as well.
1. Persona 3
P3 may have been my all-time favorite game but I'm afraid its plot no longer relevant in "I don't give a f*ck" era. In an era where turn-based JRPG no longer appealing to mass gamers, I think this one better to stay as it is.
2. All Suikoden games
Like P3 above, I'm also afraid the games may no longer relevant today. If people don't have any problems with plot and turn-based battle, they may have problem to recruit all 108 characters which they can find annoying and tedious. With zero interest on Konami itself, this one better stay off dead.
3. All Bloody Roar games
Bloody Roar games in today's engines could be awesome but with zero demands from gamers to revive it as well as its developers dead for many years, this one probably have zero chances to be remade.
4. All Grandia games
While Grandia 2 has been remastered several times including the upcoming Nintendo Switch one but none of its series got full-scale remake. Some blamed the poor selling third game and some think the game wasn't influential enough to be remade today. We do know that its creator died and Square-Enix have zero interest to see another Grandia games.
5. Front Mission 3
This can be said to all FM games but this time I want to focus on the most popular entry in the series, FM3. While I know most FM fans can't wait to see the game got remade but this is Square-Enix we are talking about. As Left Alive can tell us about it, it could ends up as a crap instead of masterpiece. Not to mention we are living in an era where turn-based games no longer cool anymore, at least to mainstream western audiences. In order to avoid controversies, SE should leave this one alone and let FM3 remained as a sweet memory to its fans.