Nope, didn't know retailers actually ask pubs what bits 'n' bobs can be put into a special edition. I knew retailers would likely try to purchase exclusive rights to special editions, but not the former.
Only obvious exception I can think of is with Zelda ALBW where that special edition had GAME's logo plastered all over it, making it look like some bollocks they'd thrown together themselves. The SE for MM3D actually looks more like a proper Nintendo packaging. I don't doubt your words, though; just never really realised how SEs worked before.
Defo hate GAME as a retailer, though. If I do buy, it'll be from NUK store, but still uncertain, as the SE could still be better. Nintendo are poor when it comes to SEs/LEs.
It's not so much what bits & bobs, it's more we [retailer] want a 'edition' what can you offer.
I was asking some devs/pubs at Gadget Show Live last year & i was asking about the pre-order DLC & all said the same thing that MS will only allow retailer specific pre-order DLC if it will be available to everyone in the future, Sony has just followed on from what i was told, i also asked about the different editions mostly about the ones that people in the USA & Japan get & that the UK/EU always seem to miss out & they mostly said the same thing that is is down to the region HQ's & they work with retailers on the 'editions' & it used to be the retailers that asked for the 'editions' so the pub's always think about a special or collectors edition now, the retailers are more for the pre-order DLC.
Also in the UK GAME is important to Sony, MS & Nintendo, when GAME went bust the big players offered the new owners good deals as they wanted a games presence on the high street & GAME was the launch partner of Nintendo, i went to a WiiU lock-in at my local GAME store a few months before the WiiU was launched & they has Nintendo PR people a couple of WiiU's & games for us to play (this is when i put a deposit on a WiiU) they also brought along sweets, can you imagine a local Tesco or Asda doing the same, i very much doubt it.
As this is going wildly off topic, i will just say that i have not had a issue with GAME & i will continue to support them, the £150 of free shares i got also helps.