Eien Densetsu (Kaiteiban) -- The Final First Stage!! Fankan
This was the second fan appreciation event, and the first to be called a Fan Kansha or fankan (the first event, while technically like a fankan, was not called one). It occurred in January 1998 in order to promote Eien Densetsu (Kaiteiban) – The Final First Stage!!. Like the previous fankan, it was put on to thank fans for their support, which is what kept the myus going after Sailor Stars (Kaiteiban).
The full video of this fankan was never released, but clips of it appear in the Special Eikyuu Hozonban (Immortal Preservation Edition) omake video for this musical. The Inner and Outer Senshi actors, Tuxedo Kamen actor Mochizuki Yuuta, Sailor Star Healer actor Okuyama Momoko, and Sailor Theta actor Endou Ado were in attendance. The fankan was almost like a concert, with 23 musical performances (though not all of them are shown in the Hozonban video).
The fankan also includes self-introductions and the usual Shitsumon (Question) Corner, this time introducing the long table we’re used to seeing for the Question Corner.
This is the best I can do for general info. See the Hozonban Video guide for more specific fankan information.