I'm sure for the first month of so most members of PL will switch to blackstar for a bit to check it out, then those who prefer PL will return, or play both, but there will be a good chunk of pl players who will switch to B* entirely. I know I'll be playing both. But I am really scared of PL dieng out for B*, because B* is a new game, newer (usually) means better.. And I've put far too much time into PL for it to die out :[