Another theory is that the CX assassin may be Commander Cody. Even though ... on dorksideoftheforce.com as Bad Batch: Is the mysterious CX-2 assassin a clone of Crosshair?.
Warning: This article contains spoilers from The Bad Batch season 3 ... this is highly unlikely. Cody going AWOL and the impact he had on Crosshair is a meaningful way to conclude his story.