Its an object that the value can be debated. Its means nothing that black panther was nominated for best picture, since the value was not on merit. it will mean something if the joker does since the value will likely be on merit.
To be frank Oscar hates superhero films, If they have Brian damaged one day and decide to start nominating superhero movies, the MCU movies would be the last to get any nomination, the fact that they are barley grounded and have a more kid friendly light comedy appeal will never get them nominations in any important category.
X2 grounded drama driven serious tone with more mature content and heavier themes will be more appealing to the Oscars than any MCU movie. this is not my opinion but a real and true oscar tick box check. reason most comedy movies hardly gets nominated for best picture unless it is black satire like some of those woody allen movies. Enter deadpool that got a DGA nomination and a golden globe nomination.
Also once Oscars sees the cinematic crossover manufactured house of the MCU, they would be turned off because Oscars usually support only director independent driven films regardless of the budget.