Suikoden is still pretty rabid about getting the last final game as well, we(they) are literally one Sequel away from the conclusion as well.
Shadow hearts as well in some regard. We were supposed to get a trilogy but they wanted to milk the franchise and came out with a flop spin-off so now the real conclusive game (#4) is also up in the air atm.
Ogre battle is also still 5 games short of it's 9 parts epic as well.
Chrono Trigger fans want that cancelled Chrono break Sequel/and or a full on remake(FF7) treatment as well.
Virtua fighter fans are still pestering Sega to make a FGC comeback every opportunity on Sns...haha.
Jet Set radios want thier sequel/remake as well & is pretty vocal about it.
Sakura wars is still top Cult-classic for Sega & is luckily making a return with a marketing campaign reminicse of old sega.
Panzer Dragoon Saga is the Holy grail of Saturn die-hards clamoring for a port/remake by many Fans of the IP.
SOR is getting it's due justice soon.
Sonic peeps want thier Sonic 3 and knuckles port badly still.
Shining Forces and Golden sun overlaps but Shining crowd is more vocal about getting 3 fully trans/ported along with a true sequel instead of the Tony Taka "Fake" shining sequels.
BOF fans still wants a true sequel, and did not adopt the moba plans capcom had in store.
Valkyria fans wants a remaster of 2 and 3 of the handheld games on modern platforms.
VProfiles fans want the final game of the trilogy as well, but Silmeria flopped hard so we're in limbo as well.
Last Story 2 was canceled and now we are not sure if Sakaguchi wants to even make/finish the sequel anymore after finding success with his moba game Terra wars.
These are just the ones I've recalled off the top of my head. I'm sure there are some more if I can recall, will post em.