Yes, that would be a copyright violation on top of everything else.
Great idea though!
I'm going to start selling Keanu Reeves T-Shirts using this little trick.
See, I'm not using Keanu's likeness if I don't label it as Keanu. I'm just going to write Neo in a Tweet, and then say I'm just cloning Neo's likeness.
Neo is not a real person, so Keanu can't sue me! Bwahahaha