No, because he's committed no offence. AOC did handle the ball with the intention of stopping a goal.
Intent's got nothing to do with it. Law 12:
"A player is sent off if he denies the opposing team a goal or an obvious goalscoring opportunity by deliberately handling the ball."
Furthermore, from the interpretation of Law 12:
"The punishment of sending off arises not from the act of the player deliberately handling the ball but from the unacceptable and unfair intervention that prevented a goal being scored."
Did AOC deny a goal? Obviously not. Therefore, impossible to give him a retrospective red card.
On the other hand, would Arsenal have appealed had Marriner sent off the right player? Difficult to say. Anyone know any precedent for something like that?
He wasn't to know it wasn't going in. He handled and it was DOGSOH. I guarantee you, 100%, that if that exact incident happens in my game Saturday, I'm going red!
Let's say it's going ten yards wide but the defender has lost his bearings and thinks he's saving a certain goal. That's his intent. Maybe he even shouts, "don't worry lads, I'll stop it going in, I don't mind the card." You're still going to give him a red for DOGSOH?
Personally, I think he was right to go red on Saturday because it probably did look to him as though it was going in. But then again, if he'd had a better view and given a yellow and said, "look boys, from where I was I could tell it was going wide, no red" - man, how awesome he woulda looked on MOTD.
It all depends on whether the ref thinks it's going in or not.