do we know the full extent of charlie's injuries yet? after he was bitten by fenrir. i mean we've already had one werewolf DaDa teacher do you really think JkR would go there again??? Doubt that very much.
Plus Charlie is definatly in the 7th because harry was defiant he would be at Charlie and Fleurs wedding, so maybe Charlie's involvment will stem from there???
Again as i put in the 'new head of gryffindor' thread who else could it possibly be???
Cheers