All doen by Blue Point, HexaDrive, or original devs (I can dream):
Panzer Dragoon Remake/Remaster collection of Panzer Dragoon 1 - Orta. PD1 & 2could use a whole graphical overhaul and emulating the originals doesn't sound very appealing. Best to just remake them IMO.
Rogue Squadron Remake/Remaster Collection of all the Factor 5 StarWars space shooting games. Including Battle for Naboo. The N64 titles could also do with better 3D assets to bring them into the present. Remake those.
Silent Hill Remake/Remaster Collection of SH1-4. The fist game has a lot of visual jank that just doesn't hold up very well in some areas. Youll enter a house and notice that furniture and appliances don't have the correct size/perspective. Remake it. If RE1 deserved REmake, then SH1 deserves similar. For the other gamesgive me Xbox's flashlight and PS2's everything else, and a lossless surround sound mix that also replicates or surpasses PS2 audio.
Metroid Prime Trilogy HD. Update some textures, bring back missing effects, make a 16:9 HUD, add surround sound... you're done
Mass Effect Trilogy. Fix the ugly textures... it may even be worth it to remake ME1 in a new engine. Hand over all the goddamn DLC.
KotOR I&II Remakes. Remake the games from the ground up while following original story and dialogue quality and plot for the first game. Make the second's story complete as it was totally unfinished when it first released and fan patches didn't fix everything. Better controls, audio, lighting... the works for both.