Sinestro

Sinestro is a supporting antagonist and recurring character in the LEGO Multiverse series. He has been voiced by Scott Pincus in all his appearances. A rogue Green Lantern and sworn enemy of Hal Jordan, Sinestro has made alliances over the years with ruthless beings such as Brainiac and Darkseid. He led an attempt to shrink Gotham City in 2016, and will return in 2019 to wreak further havoc in Darkseid's apocalyptic future.

History
At some point, Sinestro became a member of the Green Lantern Corps. When he went rogue and left the organization, he became a sworn enemy of Hal Jordan. At another point, Sinestro allied with the malevolent Darkseid, and followed him in his quest to conquer the universe.

Episode 7: A Hero Rises
Sinestro first appeared in a cameo in A Hero Rises, the seventh episode of Adventures in Gotham City. He meets with Darkseid, who at the time was in a weakened physical state. Sinestro learns that Darkseid is unleashing Brainiac, a green-skinned cyborg that will wreak havoc on Earth.

LEGO Justice League 4
Armed with Parallax's ring, Sinestro fought against the Justice League on Earth. In the ensuing chaos, he joined Brainiac in his effort to shrink Gotham City and terrorize its citizens. Sinestro enacted various parts of their plan, including the confiscation of various Wayne Enterprises vehicles.

During the climactic battle, Sinestro fights against his old adversary, Hal Jordan, and almost fulfills his mission of shrinking Gotham. However, this action is foiled by Plastic Man, who is temporarily shrunken instead. After Brainiac's ship is destroyed, Sinestro was apprehended and imprisoned in the Belle Reve Institute.

Episode 9: The Fire Rises
After Dev-Em is imprisoned in Belle Reve next to Sinestro's cell, Sinestro asks him numerous questions about Darkseid, including whether he's strong and if the "endgame" has arrived. Dev-Em remarks that Parallax is angered by Sinestro's failures, and while he shouldn't forgive him, he needs his help.

LEGO Justice League 5
Sinestro will return in LEGO Justice League 5, which is set in Darkseid's apocalyptic future of 2028.