One Piece: Nejimaki Shima no Bōken (movie 2)

As a child Monkey D. Luffy ate a piece of Devils Fruit wich turned him into a rubber man. 

When Borodo spots the Going Merry atop the Trump Siblings' castle, what appears to be a Baroque Works ship can be seen beside it.

When Bear King's underlings arrive with the King Cannon, they mention him being better than their 'last boss', El Drago, the main villain of the first movie (who also had a cameo during the end credits).

Pandaman makes an appearance in this movie. He can be seen sent flying by one of Luffy's punches when the Straw Hats storm the castle.

At the time of the release, the anime was still at Episode 70 while the manga was reaching Chapter 200. A set of clips were seen at the end of the movie in the credits of characters yet to be seen and ones currently being seen at the time of viewing. Due to being a preview, a number of the characters shown had ended up with incorrect colour schemes as at the time, this included Portgas D. Ace. Vivi's appearance as Miss Wednesday also shows her with the manga version of her outfit (with circular patterns) as opposed to the anime version (with stripes).

It's been hinted that this movie takes place at some point between the Loguetown Arc and the Warship Island Arc after the Straw Hats depart Loguetown on their way to Reverse Mountain. Vivi is not yet a part of the crew, meaning that the Straw Hats have not yet entered the Grand Line, but Zoro is seen with his three meito , including the ones he acquired in Loguetown, and Usopp has the goggles he received in Loguetown. In Episode 54, Nami mentions that three days have passed since they left Loguetown, opening up a gap into which this movie could fit.