- Complete Monster:
- This version of Thanos retains the goals of his 616 counterpart, but none of the redeeming qualities. Ruler of the Endless Resurgence, he is a horrific tyrant—as well as a horrendously Abusive Parent—who runs his empire with an iron fist. Having come into contact with the Cosmic Cube, or Tesseract, long ago, Thanos tested it by killing countless innocents or leaving them literally frozen but eternally alive and aware. Thanos also allows himself to experience death at times, using the souls of many innocents to revive himself. Heading to Earth, Thanos intends on wiping out all he sees until he finds Reed and when he has the Tesseract and ultimate power, he plots on a universal-scale Mind Rape until every living thing is his slave, trapped in a deathless hell while death itself exists only for the tyrannical Thanos.
- Reed Richards himself, post-Ultimatum. See that page for details, under the Ultimate Universe folder.
- Ensemble Dark Horse: There's a reason why the Zombie Universe from the "Crossover" and "Frightful" story arcs got its own comic series.
- Harsher in Hindsight: In "Ultimatum: Requiem", Reed tells Ben that he's calculated that the only way to prevent a future of "Death. Destruction. Genocide. Blood. All on my hands." was to kill Doctor Doom before he could perpetrate it, but despite knowing this he simply can't bring himself to kill a man in cold blood, something Ben tells him isn't something he should be ashamed of, before going off to do it himself. Considering that when Reed commits his FaceHeel Turn he effectively becomes the new Doctor Doom and directly commits atrocities as The Maker far in excess of whatever he saw Doom himself committing...
- Hilarious in Hindsight:
- Ho Yay: Lampshaded when Ben and Reed go to face Thanos:Oh, this is just pathetic. This laconic, heroic, tragicomic— garbage!!! Walking off to certain death with your heads held high! You might as well hold hands, because that's how homoerotic it is!
- I Knew It!: Issue #20 ends with the Reed Richards from the mainstream universe making contact, which would lead to a crossover. But, wait a moment. That would be the first crossover between the Ultimate and the mainstream universes... and it is not in a miniseries or Crisis Crossover of its own? There's not even any publicity about it? Many fans correctly guessed that the story would be something else.
- Moral Event Horizon: Reed begins his supervillain career by murdering his entire family. He follows up by trying to murder Sue. If he hadn't crossed it by then, his killing all the Asgardians in Ultimates sure did.
- Even for Brian Bendis and / or Mark Millar, making Mole Man a man covered in moles called Arthur Molevik, rather than the regular Mole Man just being a short, blind man, is a ludicrous step too far.
- You know you're in for some awkward and silly artwork once you see that Greg Land is on art duties.
- Older Than They Think: The Fantastic Four had already appeared in Ultimate Marvel Team-Up, an issue that would be eventually ignored as an Early Installment Weirdness. Still, that version included two departures from the classic version that would be used by the ultimate version of the Ultimate Fantastic Four: they get their powers during an experiment involving the Negative Zone, and Sue is a capable and recognized scientist on her own right.
- Strangled by the Red String: Subverted. When Johnny Storm meets Crystal of the Inhumans and declares them both 'Lovers-for-life' ... then shrugs and admits "I just thought we might get a good thing going". Sue proceeds to voice what pretty much everyone is thinking with "For God's sake Johnny, you've known her for an hour!"
- Squick: Mole Man's mole-y condition is one thing. Dramatic close-ups giving readers a good long look at it, complete with nose hair and pustules is another thing entirely.
- What an Idiot!:
- Arthur Molevik, a man working for a secretive government agency, deciding not only to continue working on a project after he'd been told not to, but to encrypt his files, the sort of thing that screams "HEY, I'M UP TO SOMETHING AND I DON'T WANT YOU TO KNOW". Surprise, he's quickly found out, and fired.
- It's the dramatic conclusion of the arc, and Reed Richards is squaring off against Nihil on the Vegas Strip! The tyrant opens his mouth to devour the hero, who stops him by picking up a nearby plasma rifle and wedging it in between his jaws!
You'd expect: Nihil to do literally anything except what he actually does. Literally anything else.
Instead: He tries to pull the gun out...by the trigger. It's... not pretty.
- The Woobie:
- The Thing, even more than in the mainstream continuity; whereas mainstream Ben has long ago accepted his transformation and even embraced it, Ultimate Ben is so depressed by his transformation that he's attempted suicide. And each one fails because his body is nigh-invincible.
- If not in the present, then when he was a kid, Little Victor just needed a hug.
YMMV / Ultimate Fantastic Four