The Marvel Cinematic Universe (MCU) is one of the most successful franchises of all time, Since its first film (Iron Man) back in 2008 they have obtained around $10 billion in profit and have yet to make a bad movie (some are weaker than the rest, but not bad), but that doesn't mean the MCU doesn't have problems, as it definitely does (tone of films/moments in films or some characters actions or similar endings) there are problems, but they never tarnish the films.
I probably should have said they haven't tarnished the films yet, because after revisiting some of the MCUs greatest films I discovered five plot holes that either confuse the plot, lore and/or logic of the MCU. And I haven't seen any mention of them at all since there release
5. The Avengers / Avengers Age Of Ultron: Loki's Staff / Sceptre Is The Mind Gem?
Loki's Staff / Sceptre in The Avengers and Avengers: Age Of Ultron is a tool given to him from Thanos to allow Loki (and others) to control people to do his bidding in a sort of mind control, so it would make sense that it is later revealed as the mind gem/stone (except it doesn't). Any time the staff/sceptre is used it is in the center of the chest — a place the mind isn't found. The soul on the other hand is, along with the heart, and the gem is corrupting the soul.
Heck, in Avengers, Loki attempts to use the staff/sceptre on Tony Stark (pictured above) and it doesn't work because his arc reactor is there covering/protecting his heart. More evidence that the staff/sceptre should be the soul gem/stone is Vision, who has that gem in his head. What goes it give him? A soul is the easiest way to put it, but it isn't the soul gem (which makes it a HUGE plot hole, because if it is the mind gem then Loki should be aiming his sceptre at the head and Vision and Ultron should not have emotions, as emotions are something that is perceived as linked to the soul.)
4. Avengers: Age Of Ultron — The Iron Man Suits
Avengers: Age of Ultron is a fun film, but a big question is why didn't Ultron use all of Tony's Iron Man suits, something Jarvis did in Iron Man 3. After all, Ultron is/was a superior Jarvis.
Now an argument that could be made is Tony blew up all of his suits in Iron Man 3, which he did do, but he had three suits over the events of Age of Ultron (one suit for the majority of the film that he used for fighting HYDRA, The Hulk-Buster and a suit for the final battle) and War Machine's suit as well. When you are living technology that has been seen taking over technology the fact this wasn't used at all with a technology based hero/heroes is confusing and a unexplained plot hole.
3. Captain America Civil War: Is Spiderman Breaking the Law?
Captain America: Civil War saw a team lead by Captain America and Iron Man fight each other in a civil war that came down to Iron Mans side trying to arrest Cap and his team for breaking the law by both helping a fugitive and being heroes that are not registered to the accords which are illegal itself.
But what about Spiderman? He was brought in by Tony to help stop Cap but wouldn't he have to sign the accords to do so? Because no registered hero work is illegal Spidey helping out without signing the accords would be illegal, but if he did sign the accords he would be able to fight street crime as diplomats have to discuss and decide if he can intervene which the accords state.
Its very confusing movie politics and actually makes Spideys role seem more forced than originally thought. The only thing I could think of for Spiderman not to have to sign is that he like Daredevil, Luke Cage and Jessica Jones are Street level heroes that deal with street problems (i.e bank robbers, gang bangers etc) and that means they do not apply for the accords as that is world ending activities/international disasters ... that is clutching at straws and as it hasn't been established it's a Plot-hole (for the time being).
2. Captain America: Winter Soldier — So HYDRA Formed The Avengers
As much as I love Captain America: The Winter Soldier, HYDRA being S.H.I.E.L.D. just brings up to many unanswered questions that actually make the concept of HYDRA being in S.H.I.E.L.D. from the beginning stupid for example;
- Alexsander Pierce putting Nick Fury in charge of S.H.I.E.L.D even though he isn't Hydra
- Defrosting their number one enemy in Captain America
- Suggesting the concept of the Avengers
- Tony Stark not finding out about Hydra when he hacked the S.H.I.E.L.D data mainframe
- Not using the mind control/brainwashing method (shown in Agents of S.H.I.E.L.D) on the Avengers or a majority of the S.H.I.E.L.D employees
- Not recruiting super villains like the Abomination into hydra
That's just a few of the top of my head and it is actually surprising that I never noticed how convoluted it actually is until my 5th viewing of The Winter Soldier.
1. Iron Man 3: The Extremis Virus Seems To Be Forgotten
Iron Man 3 gets a bad time by fans, yes, it is the least marvel movie of all the MCU films (and that is a bad thing for some reason) but something that has bothered be is the Extremis virus, that is seen to regrow limbs(image above), enhances strength and produce fire if not perfected will cause the host to explode and Tony Stark's girlfriend Pepper Potts gets injected with this virus and in like the last 5 minutes it is said that Tony cures Pepper somehow and then uses the perfected Extremis virus to allow doctors to remove his arc reactor and the virus is never heard of again, even though it heals missing limbs and would be really useful when your a team that gets injured a lot of the time because fighting super villains but nope it seems to of been forgotten.
Now some story plots that aren't that important can be forgotten in a universe this big and not be a problem unfortunately a virus with no side effects that regrows limbs is to big to be forgotten just think Tony's best friend James 'Rhodey' Rhodes is now paralysed in this universe if they had the Extremis virus on hand he wouldn't be, heck Black Widow, Hawkeye, Falcon and any other non-powered hero could have enhanced super soldier strength and a healing factor but nope its like Tony is the biggest A**hole when revisiting the previous films because it should be a huge deal.
And that's my list of five plot holes in the MCU that nobody talks about. Are there any plot holes that I left out? Feel free to comment on your least favorite below.