>Implying apple wont reduce the number of ports on the rMBP
I'm confident the number of ports on the rMBP will be the same as the MBA. Apple is going to fit the rMBP into the MBA frame or at least borrow heavily from the MBA design.
Apple will abandon USB-3 and replace it with USB-C and replace TB 2.0 with TB 3.0. These both save vertical room and if placed far back enough will allow a wedge shape like the MBA.
They might even abandon Magesafe. Or, better yet, create a Mafesafe to USB-C charger.
Edit: I think Apple is going to start making accessories rather than cater to make the redesigned rMBP to be 'everything to everyone'. It will be a money grabbing, but why wouldn't Apple do that? They'll make adapters to cater to each crowd. Need camera centric adapter? Buy the 'Pro Camera USB-C Adapter'! It'll be brilliant from a marketing pespective since Apple can just say 'Redesigned rMBP: Use it how you want!'
Well that wont be the one announced at WWDC whatever happens.