Sadly, Mio Takeuchi, who played Sae Taiga/GaoWhite wasn't in the event, but she gave a letter to the cast stating, "I am truly happy to be involved in this wonderful work. I hope to see everyone again someday. I love everyone in Gaoranger!" The cast also talked about Tetsuji Tamayama, who played Tsukumaro Oogami/GaoSilver who is also not in the event.
[Source: Natalie]