Oda always does the design of the characters for the movies. And he says that the outfits that show up on opening 13 of the actual anime One Piece (or the 15th anniversary one) are outfits they will wear for this movie.

The mysterious Pandaman can be seen having a wrestling match.

Gild Tesoro is named after "gilt" (a thin layer of gold) and "tesoro" (Hispanic for "treasure"), which fits with his wealth/power of gold.

Tesoro's subordinates Baccarat and Dice are named after gambling games.

the character Rob Lucci is to make an appearance in this film.

Master roshi appeared shortly after luffy defeated Tesoro