Right now I would say Jitney and The Price are the only locks for Best Revival. The remaining 2-3 nominees will probably depend on how The Little Foxes, Present Laughter, and Six Degrees of Separation are received.
Oslo and Sweat are definitely the frontrunners for Best Play--in addition to what Kad said, both plays are fairly traditional, narrative-wise, which older voters seem to love.
"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