Unless it's been stated specficially by devs I don't see why anyone should be putting "may be implemented" statements.
Anything in the universe "may be implemented", so to say something "may be implemented" without a direct statement from the game makers stating they are leaning in that direction, is totally meaningless. And by that logic, the "may be implemented' list might as well fill several dozen pages with things made up off the top of anyone's head that "may be implemented".
From the direct comments with the devs I've read in interviews it seems they are leaning towards an Auction House not being in GW2. So it would make more sense for that line to read "Auction House may not be implemented".
N

and i in khaini
bye bye
Though Maple Story global has a lot of people who don't speak English too well. Oh and level 10 means a really new character there.