343i is aware of the comic and tend to post pages on Waypoint for their Comic Sunday feature. As for making it canon, the balls in their court. I'm sure if they hear enough people wanting it to be canon, they might consider it.
another example is the douch bag that fired the writers behind modern warfare 2 but halo have always been the one with not nly the best story but the ones that get the best out of their deals even if its only for one console or platform.
i for one owns a pc, ps3, psp, ds, (previously owned a) wii, xbox (no kinect -_-) i am also one that cant wait for mass effect 3 but that because the main thing i look for in a game is the singleplayer story i love the story in mw, mw2 and black ops but multiplayer wise i didnt care for the least.