Gary Oldman will probably be shooting the new Batman film over the summer, so he definitely won't be treading the boards.
Jon Hamm is a divine choice for Petruchio and is definitely well-known enough to carry a show. He's on one of (if not the) most talked-about shows on television. And it's not like SitP always goes for stars: they've had Jonathan Groff lead two productions in two years, had Michael Stuhlbarg as their Hamlet and a relatively star-free (unless you count Martha Plimpton) production of MIDSUMMER that was the best Shakespeare they've done in a decade.
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body