If they end up doing a Game Boy Classic, I would prefer that they include the entire Game Boy family as part of one set. GB, GBC and GBA. I know it leaves more possibilities to make money down the road if they keep them separate, but I would prefer to see one unit.
Also, which screen color will they choose for the original GB games? If they go original GB only, will they include a color screen to use the Super Game Boy color features?
AT THE VERY LEAST, I think they will combine GB and GBC together.