It'd be great to see professional, polished, as close to arcade perfect versions of:
Vector games:
Armor Attack
Space Duel
Boxing Bugs
Black Widow
Star Castle
War of the Worlds - but several enhancements would need to be made here such as: bonus mothership stage, multiple piece turret that allowed 2-3 hits before you died, etc.
Raster:
Montezuma's Revenge
Berzerk
Donkey Kong
Scramble
Zoo Keeper
Kaos
Tapper
...and for other translations:
Intellivision's Utopia, improved with keyboard control, improved graphics and speed up option
C64's Pinball Construction Set, with enhanced features and improved in all areas for Amiga.