劇場版 ソードアート・オンライン -オーディナル・スケール-
"It's just a game... Or so I thought—"
Sword Art Online the Movie: Ordinal Scale - Easter Eggs & Hidden Details
Easter Eggs
Mother's Rosario / Yuuki's Spirit
During the final battle, when Asuna uses her 11-hit combo 'Mother's Rosario,' the spirit of Yuuki Konno (who died in Season 2) appears as a purple silhouette to guide her hand. It symbolizes that Yuuki is always with her.
The 'Switch' Mechanic
Eiji whispers 'Switch' during a battle, a mechanic specific to SAO. This is the first clue to Asuna that he is an SAO survivor, specifically from a high-level guild.
Cameos of GGO and ALO Players
Characters like Sinon (from Gun Gale Online) and Leafa (from ALfheim Online) appear to help in the final raid. Leafa's absence for most of the movie is explained by her being at a kendo training camp.
Restaurant Aincrad
The restaurant where the characters meet is named 'Wagnaria,' a reference to the anime Working!!, which shares the same character designer, Shingo Adachi.