Oh God yes Shenmue!!
Legend of Dragoon with improved visuals and maybe extra levels/areas would be great but a Prequel set in the Dragon Campaign Era with Zone of the Enders style Ariel Combat between Dragoons, Winglies and Virages would be fantastic!
Even a Sequel would be great!
Funnily enough I have been working on a plot bunny for a sequel story/game pitch to Sony. Story/Script only though.
I'd love to see Record of Lodoss War off the Dreamcast updated too!
Shadow Hearts as a Collection would be fine but I think Koudelka needs a Graphical Overhaul as it is rather dated/visually primitive now. Although the FMV still looks nice despite age.
Onimusha Collection would be good but visually it is still gorgeous, so other than bonus features like New Character Outfits/Skins, Extra Demon Dungeons, Concept art etc not sure.
The very first Tenchu was Glorious!
The sequels.... Not so much.
Monster Rancher 2 as a remake would be super and an RPG based on the Anime timed with a new broadcast of the Anime could revive Tecmo's ailing franchise and sell loads of merch to kids that have only just heard of it.
Discworld Noir could do with a re-release but it is unlikely.
I would love to see Populous: the beginning remastered both visually and extra campaigns with online Multiplayer.
It would be good if Eidos negotiated with the Team at work on LoK Blood Omnicide Mod to release a collaborative 3d Blood Omen game.
Maybe then the Mod will finally be complete.
I honestly would be happy to pay for this.
If the Dreamcast version of Soul Reaver was released as a remaster that would be good as both PC and PS1 versions while excellent games do look awful.