On a very awkward appearance on Baltimore WJX, Butler revealed that his next role would be in Fiennes' adaptation, and he described it as "a passion project" for them both. He didn't specify which role he would be taking on, but I'm hoping it's Coriolanus' sworn enemy, Tullus Aufidius. He always looks so good with blood on him, and it would be glorious to watch him fight Fiennes.
Of course, this is Shakespeare and financing could be difficult even with Fiennes at the helm, though a solid cast should help with that. It was one of the projects at the IFF this September, and I hope they found someone to give them some money. Not only does the world always need more Shakespeare, but Butler needs a meaty role now. Seeing as it was Steven Berkoff's Coriolanus was what ushered Butler into acting, I can think of no better production (save perhaps The Scottish Play) that could wrangle him another plea bargain.