The "media group" that is mentioned is this:
http://en.wikipedia.org/wiki/Media-Saturn-Holding_GmbH
My brother in law is working for Real which is a part of the Metro Group that owns the Media-Saturn holding Gmbh.
He told me the exact same thing. He is one of the higher ups and got the memo.
(higher ups no matter if they belong to Metro itself, Real, Media Markt or Saturn get the memo for all of them.)
He told me that neither Real nor Metro are part of this deal it just includes Media Markt and Saturn. (Metro and Real have not enough consumers buying entertainment devices so they are excluded)
Sony plans to bring all the kids/parents to the PS4/Vita to have an advantage over Microsoft. Thats why its targeting potential WiiU owners. Well and of course to weaken the Nintendo brand in Germany.
