Tbh I feel like if Jon got that yellow power ring back he wouldn’t even join the Sinestro Corps, he’d show up to steal a battery and try to punch Sinestro and then just go back to Gotham to wreak havoc.
Like can y'all imagine Jon willingly allying himself with Sinestro? Because I can’t.
I can see him trying to clock Sinestro in the face because “This guy looks like the leader of y'all and this is the best ‘fuck you’ I can think of.”
Man has tried to punch Batman you cannot tell me he wouldn’t try to punch Sinestro.