During the production of WAI, I had an idea in mind akin to the new weeks from FNaWs, where you would unlock a new set of nights but different, in this case, for WAI, it wasn't called Encore Mode, but rather "Dream" Mode, new characters would appear every night, on top of that, the characters would have different AI values, like DM Night 1 would have everyone leaving or something like that, at first I thought on using characters I was very into during the time of development, however, that later changed to be more of a tribute to fnaf fangames by having the idea of putting fnaf fangames characters, like in Five Nights at Treasure Island: Mickey's HorrorNight Survival, as for Encore mode itself, it was later added as a bonus night in Fun Night with Mr.Hugs, where the characters that were added are modifications of some Trash and the Gang animatronics, with one of them becoming a character far from being an animatronic.

If I were to revisit WAI, Encore mode definitely is gonna be added in, but, i'd have to see with the characters and such, it would be added as a bonus after beating Night 6 or something like that.