Broken Base: Is the film just as good as the classic years of The Simpsons? Is it not as good as the golden age but still better than the show after Seasonal Rot set in? Does it instead suffer from the same plotting and characterization issues that plague the recent seasons? Or is it an enjoyable but flawed experience that just didn't quite live up to the hype?
Draco in Leather Pants: Many people have gone out of their way to portray Russ Cargill as a hero despite sealing Springfield and its residents in a giant dome and almost blowing it up with a nuke with its denizens inside it.
"Funny Aneurysm" Moment: Marge comments that the government isn't going to listen to her and Bart discuss Cargill's plans. Then it turns out from the PRISM scandal that yes, the NSA has been tracking and bugging people.
Harsher in Hindsight: The plot about Springfield being screwed over by an incompetent EPA trying to cover up a polluted water hole might seem a little too realistic after a similar thing happened in Flint, Michigan.
Comic Book Guy's guess as to what EPA means is that it might be the sound effect Green Lantern makes when Sinestro threw him into a vat of acid. Sure enough, DC Comics used this sound effect in an issue of Green Lantern's Sinestro Corps War arc, but there were no vats of acid involved.
During the live tweet of the "Every Simpsons Ever" marathon on FXX, it was pointed out that Homer on the wrecking ball was an idea used by Miley Cyrus for her infamous "Wrecking Ball" music video (only there was no nudity involved with the Homer version). This was obviously a joke, but this time (and the time Homer was riding a wrecking ball on "Sideshow Bob Roberts") are funnier in light of thisnote Also, twerking Miley Cyrus's way wasn't invented until 6 years after the movie, but that's neither here nor there.
During the ending credits, the French anthem is sung with lyrics stating that Springfield doesn't have an anthem so they decided to plagiarize the French one. For Season 26, one of the plots for announced episode "Walking Big & Tall" is about Lisa writing a new anthem for Springfield after learning that the old one was plagiarized.
The Grand Theft Auto parody where the walrus guns down a penguin who did nothing threatening seems especially prophetic with GTA Online demonstrating the modus operandi of most players is Kill 'em All, especially players who are not a threat or actively a part of the game's combat.
During the motorcycle game to win the truck, when Homer tells Lisa he's scared of speeding up the motorcycle, Lisa yells to Homer "JUST DO IT!".
Informed Wrongness: Homer not wanting to go back and save Springfield is treated as him being his usual stubborn selfish self... except that he had every right of being wary of ever going near that place again because the townsfolk tried to kill not just him, but his entire family including his infant daughter to boot. They didn't exactly come off as worth the help. Though it should also be noted that Homer himself was the reason the townsfolk had tried to kill them, and they openly declared that they only wanted Homer...at least at first before they decided to kill his family as well.
Spider Pig, Spider Pig, does whatever a Spider Pig does... Which backlashed to some extent, since it was such a Forced Meme due to deliberate viral marketing.
Cargill's whole "mad with power" speech.
Moral Event Horizon: Cargill crosses a line when he plans to blow up Springfield with a small nuke. The kicker is that this plan would kill off thousands of supposedly (supposedly is a key word considering Springfield) innocent people, including children. And he knows this, and doesn't give a damn about the consequences.
He crosses it even further when he attempts to shoot Homer, but not before Maggie drops a boulder on his head.