Update:
Common is going to be the Tattooed Man.
Suicide Squad May Feature Common As This Green Lantern Villain
http://www.cinemablend.com/new/Suicide-Squad-May-Feature-Common-Green-Lantern-Villain-71959.html
When Common was announced as being a part of the cast of David Ayer's Suicide Squad a couple months ago, a rumor began swirling around identifying him as playing the famed Aquaman villain known as Black Manta. Now that the character has been spotted on the set of the blockbuster, however, it appears as though those reports were false, and that he will actually be playing a completely different villain: Abel Tarrant a.k.a. The Tattooed Man.
Set photos from Suicide Squad popped up over at Just Jared, showing off Common's ink-covered look for the new movie. There hasn't been any official confirmation that he is indeed playing The Tattooed Man, though there are definitely big clues to suggest that the most recent speculation is correct. Part of it is the fact that the character from the comics has been associated with the titular team in the past, and the other part of it is that Common was spotted with a tattoo of a big snake on his head - which is Tarrant's most notable piece of body art:
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