Can’t say much about Cammy. I’ve never had much trouble with her. Standing normals shut down her Cannon Strike game, and I’ve never really seen anyone do anything beyond that. Auto-correct Cannon Spikes are a pain, but can be baited and are very punishable for Adon.
Dictator is a matchup I’m learning more and more about. The right standing normal (typically standing jab, since it has priority for miles) can stop his pressure game, j.MP is awesome air-to-air against him, and his lack of a DP or similar anti-air makes jumping in, crossing up, and JT relatively safe against him. I used to think it was a bad matchup, but I’m gaining more confidence against him. He’ll like to spam s.HK, so be prepared to either focus or just sweep him.
Guy is annoying if he picks one move and spams it a lot. He can slide under JKs and throw you for free, he can flip throw you out of all of Adon’s specials, but otherwise, Adon has better normals than he does. Dashing under bushin flips is usually a free hit. If you break his pressure, just zone him. There’s not a lot he can do about it.
I don’t have a lot to say about Rufus, because I don’t play against him often. Justin Wong said Adon has no way of dealing with dive kicks, but personally they seem pretty easy to deal with. It’s j.HK (ultra setup) and Snake Strike that worry me in this matchup.