Assuming nothing groundbreaking happens in those episodes, it looks like we can expect a maximum three-episode arc going into the finale.
According to future episodes’ official synopses, it looks like the death of Max will create a rift between Brennan and Booth.
In addition to that, we are going to be seeing an old flame of Bones’ (Tim Sullivan) appearing again.
Considering the final two episodes have similar titles “A Day in the Life” and “The End in the End,” it’s more likely it’ll be a two-episode arc to close things out.