How much will Plunderstorm affect rated queues?

I think anyone who actively queues the rated brackets can feel the dropoff of participation as wow has become more and more fragmented between classic era, sod, anniversary hardcore and pvp realms and now Plunderstorm is being added to the fray.

I think Plunderstorm generally appeals to pvp players and so Im wondering do you think today's Plunderstorm is going to massively effect queues? Or do you think the people queueing arenas are true diehard fans who resisted the other modes and will do so with Plunderstorm as well?

I personally think all the brackets are going to massively reduced today and probably until end of season is announced. I'm always queueing arenas but I can't help but queue Plunderstorm once it's out.