Hmmmm…🤔🤔 The possibility is there, it will depend how big the mission will be because now fatal fire just hinted what the next mission in night 3 will be, depending how the mission plays out in night 3 there could be a 2 part but i have to point out something they made night 2 a 2 part because they had to revamp the story mode completely like add the new security guard, revamping night 1 a little bit, adding new levels to explore, adding the voice actors, and many more.
But there is a good chance that they will add a 2 part on night 3 like in part 1 we will do some tasks and side missions then in part 2 add the Bonfie chase, anyway at the moment it too soon to tell right now.