Ray Breslin (Sylvester Stallone) is the world's foremost authority on structural security -- specifically prisons. His skills are put to the test when he is framed and put in a high-security prison of his own design and must find the person who put him there.
It's not known what role he would be up for but my hope is of course that Arnold has the role of the man who sets up Sly's character and sends him to prison. According to Deadline, Arnold has only been approached for the role and is by no means signed and guaranteed. But I think the very fact that we have concrete proof that this is indeed in the works is a partial victory for us fans.
Deadline also adds that Director Mikael Hafstrom (The Rite, 1408) is considering coming on board to Direct. He's not a huge name that's for sure but if Sly and Arnold are there to help him out I'm sure he will do just fine. We don't have official confirmations guys, but The Tomb is shaping up to be a must see!! Stay tuned for more!!