Considering the amount of western licenses that Lego is managing, I am wondering how difficult and expensive it would be to acquire Japanese ones. The potential profits could be huge, in relation to both high number and dedication of manga and anime enthusiasts.
City and sci-fi sets for Dragon Ball, pirates ones for One Piece, ninja style ones for Naruto. Personally I would like to see Macross and some classic Go Nagai robots.
Anyway the dream - and perhaps most profitable - partnership would be with Nintendo and the endless possibilities offered by its IPs lore. I think of a Mario kart theme, a Zelda castles-fantasy line, a Pokemon one on the model of Brickheadz. Remembering the Amiibo crazy collecting phenomenon, a hypothetical Nintendo license would probably pay for itself in a short time with a handful of minifigures series.
Lego if you are reading, please think about it!