Thread:Shabook/@comment-27496405-20180118032236/@comment-112155-20180118180635

The Wikia Editor wrote: Marvel's official standpoint is that the MCU is unambiguously part of the Marvel Multiverse. The Young Avengers did canonically visit Earth-199999, albeit only for a day, so I personally believe that we should at least make note of that, like Marvelous suggested. You're right in this, the Young Avengers visited Earth-199999, in what can be considered as an off-screen event that happened in this universe.

However, we cover only events that appear in the "Marvel Cinematic Universe" Brand, either films, TV series or tie-in comics.

What happened in other comics is covered in the article that I linked above. Marvelous' proposal is out of place in this wiki. As simple as that.