Shark hull + sails

@Musicmee has already given the answer, but the context is in this posthere from the official hunger deep page, which I quote:

"TOOTHSOME NEW TRAPPINGS

Alongside these new features, The Hungering Deep offers time-limited campaign items such as a special figurehead, unique drum variant and speaking trumpet, plus the Hungering Tattoo Set and some scars perfect for born survivors. Also arriving at the Shipwright during The Hungering Deep but remaining once the campaign ends is the new Shark Hunter ship livery set with hull, sails, figurehead and flag that may help you find like-minded individuals on the open seas..."

So the limited edition stuff like the drum, tattoos, scar and speaking tube will be gone, whilst the shanty and ship stuff (and hopefully Meg in some form) will remain.

Will be interesting to see what new drum designs and speaking tube designs they can come up with.
I also want some clothes that show my tattoos so that I don't have to run around naked all the time!