Whilst it does seem obvious to do so, an airline cannot negotiate codeshares on its services before the route is announced. There has to be time between a route going on sale and a codeshare being placed on it. This goes for all routes, regardless of how obvious it may seem.
A codeshare cant be the deciding factor for a new route as its seen as collusion between two businesses - in this case Flybe and AF/KLM. So discussions between the carriers cannot begin until the route is announced.
Quite sure your contact is correct though - there will undoubtedly be codeshares on those services in the coming months.