why

A chibi-style character resembling Sasuke Uchiha runs with a determined expression against a blue, streaked background, then walks alongside a character resembling Sakura Haruno on a tiled floor, followed by a character resembling Kakashi Hatake adjusting his headband, then the three stand together with a character resembling Naruto Uzumaki, before the scene cuts to a spinning tunnel effect, and finally the three characters are shown in a desaturated, sepia-toned scene with a fourth character resembling Itachi Uchiha.