Having once been an active wiki editor myself for several years (the Babylon 5 one) I can attest that unless there's a direct source cited: trust nothing. Especially when it comes to timelines.
To give an example, I once attempted to clean up and fill in some of the timeline related articles and came across the date of birth for Sheridan & Delenn's son with the source cited as a timeline in one books published by JMS's company. When I checked the source, turns out it was basically a fan made timeline and the source for that particular date was cited as: (guess what!) the B5 Wiki...
So far as I can tell, canon in the MCU is pretty much like canon was in Star Wars before the Disney buyout. The movies are what matters most and everything else has to follow along, but don't really have any active input into the canon themselves. If a movie contradicts them, well: tough luck.
The published works are basically just tie-in merchandise and unless one of the big-wigs (like say the Russos or Feige) have a direct hand in it, I wouldn't expect any future movies to pay even the slightest bit of attention.
The TV shows are in a bit of a weird place, like two little bubbles (AoS/AC & Netflix) of their own canon stuck to the side but never acknowledged by the movie canon.