EP Jeff Pinkner teases the narrative structure of the upcoming fourth season of Fringe. Spoilers follow.
Pinkner says that the 2026 future glimpsed during last season’s finale was put to bed when Peter crashed the future, but teases a “different future” and more flashbacks:
“The future that we saw in 2026 will now not have happened, because by altering the past, inevitably you set in motion a new chain of events that lead to a different future.
There will definitely be [flashback] episodes, but the past would be different as well because Peter wasn’t a part of it, but he would be in the future.”
Source: TV Guide