Originally posted by Silent Master
I think he covers that when he stated "The same goes with comic books, manga, and other written works pertaining to certain movies".
Except he put that bit into the part about adaptations/novelisations, while pointing out that tie-ins, like Star Trek tv shows, are canon, which those comics actually are as well. They're technically their own standalone stories that exist within the MCU. You don't actually even need to see the films to be able to read some of them. For example, the Black Widow Strikes 3-issue series is about MCU Black Widow, but the story is its own separate thing that has her doing a mission totally unrelated to the films. So, it is canonically a part of the MCU, and it doesn't alter anything we see onscreen. But if his ruling does include stuff like that, then it's a bit silly IMO. Allowing one canonical tie-in while dismissing another, simply because one was printed on a piece of paper, makes little sense to me.