I doubt AF weapons will all be related to Hamlet, odds are the higher tier Hamlets are for future content in which they add greater rewards as well as increase the chance of obtaining the lower tier rewards.

Think about the AF weapons themselves though, there has to be a reason why they've been taking their time to introduce them, odds are it's going to be more then just 9 seals, it may involve a unique quest line for each weapon that may even face you off on a one on one battle against some opponent lol. There's a lot of ways they can go about it, but odds are the reason we haven't seen the weapons implemented yet is because of the quest line involved in getting them.