As the above tweet mentions, Toei completely removed Sanji from the scene ... giving us a glimpse of one of the saddest backstories in the series. The first part of the Egghead Incident Arc ...

To make this occasion extra special, they are set to bring One Piece voice actors Kappei Yamaguchi (Usopp) and Hiroaki Hirata (Sanji), an Egghead Island-style laboratory, a Kaiju No. 8 game ...