These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Black Hole
Alternate Character Interpretation: Did Maximillian abandon Dr. Reinhardt at the end, or did he just not have the ability to send the elevator back up? Either is possible for such a cold and murderous machine.
Another possibility is that Reinhardt already gave him orders to stop the heroes, and he can't help Reinhardt until he completes the task he was already given. Of course, he then drops that task entirely to fight V.I.N.CENT.
For that matter, Reinhardt mutters "protect me from Maximillian" at one point; he may just be trying to play the sympathy card on Kate, or Max may really be the one in charge.
Everybody Is Jesus in Purgatory: In the finale, we see Reinhardt merge with Maximilian in Hell and then we see a spirit heading for Heaven. Someone assumed that since Reinhardt had killed Frank McCrae for his own nefarious purposes, he's condemned to Hell in McCrae's place, and the spirit is actually McCrae's being redeemed.
The movie clearly owes more than a little to Forbidden Planet (a space crew encounters an arrogant bearded scientist with a secret who is the last survivor of a space expedition, and is now hanging out with a hulking robot he built), but the most thematically notable parallel is that Maximilian is Reinhardt's dark alter ego, his id monster—the robot is named after Reinhardt's actor, for goodness's sake. At the end, Maximilian merges with Reinhardt, and Reinhardt finds himself trapped inside his evil self inHell.
The ending may be more straightforward than we think. After all, assuming there is an afterlife, plunging into a black hole certainly will send you there, one way or another.
Rather coincidental that there'd be a funeral on the very day that the Palomino's crew arrived, isn't it? Maybe not: it's entirely possible that Reinhardt turned the murdered corpse of Frank McCrae into one of his automatons, then had the man's mindless shell destroyed when he realized Kate was among the new arrivals and might recognize her father's gait and posture.
Reinhardt would've avoided so much trouble if he had just remembered to keep B.O.B. out of reach from the Palomino crew instead of letting it become pals with V.I.N.CENT and telling it what actually happened to the crew of the Cygnus...no one else on the ship could have told them anything, since they're all robots without speech capability.
In the novelization, B.O.B. explains that Reinhardt and Maximillian missed reprogramming him to be obedient, as they did all the other robots on the ship, because he was deactivated during the mutiny, and he has survived with his personality intact since then by acting like he had been reprogrammed.
The strings holding up the flying robots are very visible in some scenes (like BOB's first scene in parts storage).
In the funeral scene, the humanoid robots on the very edges of the room have the tops of their heads cut off by the matte painting of the room's walls as they walk out, which rather gives away where the set ends and the painting starts.
Some of the "meteors" are visibly transparent as they fly around the Cygnus.