From LatinoReview.com:
UPDATE:
Your hopes might be crushed, DC Comics fans. Word has come down the line that this Supermax is NOT the Justin Marks Green Arrow movie re-drafted. It's a totally different screenplay that happens to share the same title. This one is just a supernatural prison break movie...
...which makes me oh-so-sad, because the Green Arrow Supermax was badass. More could probably be made of writer Christopher Allen Nelson's background in special effects, but only to provide context for this supernatural prison movie.
The good news rolled into this update is that the Marks Supermax still exists somewhere (probably in the hands of Warner Bros, who has a long-standing deal with DC Comics - which they own), we'll just probably never hear of it referred to as "Supermax" again
Original article:
The plot synopsis of the current draft has been boiled down to remove this reference:
"Supermax" takes place in a Maximum Security Prison for the Super-Natural as a skilled guard must join forces with a lethal inmate after a riot ensues in order to fight his way through various monsters and mad-men in order to survive.
The version we heard of doesn't make mention of any skilled guard, and the "lethal inmate" could still be someone other than The Green Arrow. However, what made Supermax so cool as a spec script was its origin story peppered throughout a unique adventure where the wrongly accused Oliver Queen (Green Arrow's identity) is put in a prison for supervillains (think Arkham Asylum mixed with Alcatraz) and forced to break out before jailhouse assassins from the DC rogues gallery can kill him.
I hope the script that was just bought for six figures from Nelson and Rouse is at least similar, as DC needs to start unifying its super-person universe to keep up with Marvel when The Avengers hits.
The obvious warning light is that the news in no way mentions The Green Arrow, so the character might have been dropped from whatever version of the script just got sold. It sounds like a similar idea, just not with a recognizable character in the lead role.