You might be onto something there.
I could see Roy having been brainwashed and patrolling as someone else, maybe even a villain.
For all we know he might even be black-beatle, though slade or red x seem more plausible.
Why he might black-beatle?
-They literally can't find roy's body
-just the timing that goes along with this episode
-His voice seems pretty distorted
-Sportsmaster seems to enjoy his 'new' partner
farfetched, I know, but u can never be certain...