As you're probably aware, you can see The Professor, Fry and Bender in their time machine from "The Late Philip J. Fry" in an episode of Disenchantment, suggesting that the show is -- at least as far as Disenchantment is concerned -- set within the same world and continuity as Futurama -- just in a different time period.
"I Know What You Did Next Xmas" has just confirmed that
Futurama reciprocates this idea (unlike, for instance, "Simpsorama", which is canon as far as
The Simpsons is concerned, but non-canon as far as
Futurama is concerned). But it throws up some major confusion regarding how everything pieces together.
Some people always assumed that
Disenchantment was set in the distant future after the events of
Futurama. I always assumed it was supposed to take place in the second Medieval period after civilisation is destroyed by aliens (Bender) but before Earth is destroyed by aliens a second time as seen out of the window when Fry is frozen in "Space Pilot 3000".
But in "I Know What You Did Next Xmas", The Professor is travelling backwards and he sees, in this order:
- the future periods depicted in "The Late Philip J. Fry"
- a giant Bender punching a hole in Planet Express and walking away
-
Disenchantment- Earth being destroyed by eyeball monsters
- the events of "I Know What You Did Next Xmas"
On the face of it, that means that, at some point after this episode, Earth is destroyed by eyeball monsters, then the events of
Disenchantment take place and, THEN, Planet Express is somehow rebuilt exactly as it used to be and a giant Bender punches a hole in it. That doesn't make much sense at all.
While I'm sure the placement of this where it is is an error on the part of the crew making this episode -- most likely they just figured
Disenchantment should come at the very end of the things we see for the sake of pacing and "saving the best for last", we can sort of headcanon our way around it if we want.
Perhaps The Professor saw giant Bender and went to stop the time machine, but accidentally overshot things ever so slightly (as he's prone to do) meaning that
Disenchantment is set earlier than
Futurama.
Perhaps those eyeball monsters are actually the aliens that destroyed civilisation the first time. Because of
Bender's Big Score, we know that Bender is actually to blame specifically for destroying those buildings outside of the cryogenics lab window, but that doesn't account for Earth civilisation being destroyed to the point that they rebuild it with Medieval buildings. So perhaps the alien eyeballs also invaded at roughly the same time and destroyed everything else.
Then
Disenchantment is the resulting civilisation that pops up in its place.
Then, at some point,
that civilisation is also destroyed by an alien invasion and the world of
Futurama that we're familiar with -- New New York, etc -- is built in its place.
The Professor saw all of this and, realising he'd gone a tiny bit too far into the past again, nudged the controls ever so slightly to the right to bring himself back to the correct time. This took place in the brief instance during the cut from the shot of him inside the time machine to the shot of the machine appearing inside Planet Express.
Or can someone else make this make more sense?