What PC and or games for other consoles would you like to see on the Colecovision?
If I could pray to the Colecovision gods for one game it would be Zeliard. Zeliard was created by Game Arts and originally released on the NEC PC-8801 then later ported to DOS. This game is filled with a lot of awesome. The gameplay itself is sort of a cross between Namco's Dragon Buster and a RPG. It also has a kick ass sound track (like many of the other games released by Game Arts).
http://youtu.be/WkAnWnfmQCM
http://youtu.be/3Nqgjs5wYnU
I don't know if this game is technicaly possible on the Colecovision or the SGM but a man can dream