Tbh there's a lot of ships I'd want to be next but I feel like the most likely ones for the next release in my opinion are either Rose and Kanaya or Eridan and Feferi (not a super popular ship in the community for obvious reasons but it'd be the easiest way to release the two with another plush in some way (unless they do Eridan with Roxy instead, in which case I'm buying a hundred))