Sinestro

Sinestro hasn’t even been confirmed to appear in the DCEU yet, but rest assured he will. He’ll be the main antagonist in the 2020 Green Lantern Corps movie and his impact will be huge.

He will likely start the movie as a Green Lantern himself – like he did in the awful 2011 offering – but go on to form his own yellow fear Corps (the Sinestro Corps) and go up against the Green Lanterns as the main villain.

This will rock the entire universe, as Green Lanterns from every sector (of which there are 3600) will have to come together to face him and his own Corps.

The fight against him may even kill off several Green Lanterns, resulting in new ones being recruited – probably including at least one from Earth.