One thing we can be thankful for with DC's 'The New 52' is the Green Lantern continuity has remained untouched (from what we've seen so far). In one of the shocking moments at the end of War of the Green Lanterns, Sinestro was chosen to be the bearer of a Green Lantern power ring.
While once known as one of the greatest Green Lanterns, Sinestro soon became obsessed with establishing order on his home planet Korugar. He abused his power, neglected his sector and ruled his planet as a dictator. For this, Sinestro was banished to the antimatter universe by the Guardians of the Universe and eventually came into possession of a yellow power ring.
A constant thorn in the side of the Hal Jordan and the Green Lantern Corps, he had no choice but to form an allegiance with Jordan during Blackest Night and Brightest Day. Sinestro developed a bit of respect for Hal when he took it upon himself to deal with the renegade Guardian, Krona. It may have been the slight sign of compassion Sinestro showed when Hal was stripped of his power ring or it could be something bigger. With Sinestro back as a Green Lantern, is he destined to find redemption and become a hero once again? (Minor spoilers from Green Lantern #2 below).== TEASER ==
Sinestro may have extreme methods in dealing with problems but he's not completely evil. Sinestro believes he knows what is best for the universe. He doesn't act seeking personal gain but does what he feels in necessary. Deep down he has the right idea in bringing about order. It's just that his extreme methods often come into question.
The fact is, he was chosen to become a Green Lantern again. Hal would like to think there was a simply a glitch in the ring but the Guardians have said the rings are never wrong. They are made to seek out the worthy and, for whatever reason, Sinestro was chosen.
With Sinestro's visit to Earth to see Hal Jordan, there are some things that could happen. At some point, Hal has to become a Green Lantern once again. He already spent quite a while away from the Corps (when possessed by Parallax and during his time as the Spectre). Hal Jordan is destined to be a Green Lantern. It was what he dedicated his life to. Hal was pretty much a Lantern 24 hours a day.
It was Hal that opened Sinestro's eyes. Perhaps seeing how unselfishly he threw himself into battle against Krona managed to give Sinestro some inspiration. He may not feel he commit any foul acts when he wore a yellow power ring but he has to understand the different between his Sinestro Corps and the Green Lantern Corps. He may never be completely obedient to Guardians but there was a time he fully believed in the Corps. Even though he possessed vast power with a yellow power ring, he has to realize that using fear is not a way to earn the respect of lesser beings.
Sinestro probably wouldn't care what others think of him but it's not like he set out to be a bad guy. He didn't decide one day, "I'm now going to be an evil force in the galaxy." Being a Green Lantern once again puts him in a different light. Whether he wants to admit it or not, he just might actually be hungry for some redemption.
What people, including Hal, don't realize is Sinestro has an incredible amount of will power. Hal may have been the current greatest Green Lantern but it's been Sinestro's lack of focus that has held him back. In Green Lantern #2, he does some incredible things with his ring that would impress even Hal. If Sinestro could embrace a little more compassion and be willing to devote some time to those he considers beneath him, he could do a lot of good. Not only that, he could make changes beyond a global level. He created his own Lantern Corps. What if he used that energy and effort for good instead of evil?
What would this mean for his character? Will it result in the loss of his arrogance that practically defines who he is? He may hate Hal but maybe it's because they have some common traits, however small they may be. They both feel they are worthy of possessing the greatest power in the universe. Both feel they can make the decisions the universe needs. Both are willing to go against the Guardians.
Sinestro may have the potential to be the greatest hero in the universe but it's something he won't allow to happen. He possesses the potential to do what no one else can. It's his arrogance that is holding him back. He feels he knows what is best and won't put much effort in saving the little people. He tries looking at the bigger picture. And the last thing we need is for Sinestro and Hal to become buddies and go out fighting the bad guys together.