In the leadup to it's official announcement, the reddit account "5541ggnik001" teased the game. As part of this, the account changed it's profile description several times.
September 6th: "Shhh. We're getting closer. Closer. Clo5Er. clos # r. rrrr. r ... I can hear you br # 4thing. Thi5 will be fun ,,,"
September 8th: "1t's reAl. 1t's hAppen1ng. shhh. we're gett1ng closer. closer. closer. clos#r. rrrr. r... 1 can hear you br#Ath1ng. th1s w1ll be fun,,,"
September 9th: "shhh. what gam2 do you think you ar2 playing? w2'r# g2tting clos2r. clos2r. clos2r. clos#r. rrrr. r... i can h2ar you br#athing. this will b2 FFFFun,,,"
September 10th: "shhh. w#'r3 g#TTing clos3r. clos3r. clos#r. clos#r. rrrr. r... i'''m waTching you. i can h3ar you br3aThing. This will b3 fun,,,"
September 11th: "shhh. we're getting clOser. clOser. clOser. clOs#r. rrrr. r... i c4n he4r yOu br#4thing. if yOu 4re v#ry quiet, m4ybe i will nOt find yOu. this will b# fun,,,"
September 12th: "5hhh. we're gettiNg clo5er. clo5er. clo5er. clo5#r. rrrr. r... i caN hear you br#athiNg. thi5 will be fuN,,,i've be#N liviNg iN the 5hadow5555.,,,"
September 13th: "shhh. do you ev#r plAy make believe? pr#tend to be one way when you are rrrr. r... really the otheR? this will b# fun,,,"
5541ggnik001 also made some comments in reply to speculations regarding FNaF AR. These comments can be seen on it's profile.