[noggin]

A quick question for you experts
So the RPi 2 will never support Atmos?
I would love something that does 3D MVC MKV and Atmos but it seems nothing exists, right?

No - the RPi 2 will never support Atmos, as that requires HD Audio to be bitstreamed. The Pi 2 will decode the Atmos track to 5.1 or 7.1 to PCM at best. (Well I say never, I'm sure some clever person could work out a way of getting the Atmos 5.2.1 to be output as 8 channel PCM - but I'm not sure how easy that would be to integrate into existing amps as they probably wouldn't expect it to be delivered in that format...)

I think you are either looking at Windows + External Blu-ray player software or some less-than-well-supported, will-it-work-next-month, will-it-work-as-advertised ARM box, probably running Android...