Of course it's all rumors and speculation at this point but the info/leaks/guesses are coming faster lately.
It's all but a given that the new MBPs will be built on Sandy Bridge chipsets and leave C2D in the past, finally. Current gen MBPs are in short supply so the refresh will likely be happening within the next couple of months or so. But -
how much will the SATA problems on the first round of Sandy Bridge chips delay things?
Everything else is guesswork. USB 3.0?
Light Peak? MacBook Air style solid state storage only? Higher res 13" monitors?
Will the 13" use only integrated graphics, and will we see a switch to AMD graphics for the 15"/17"?