Nintendo has done something similar with the Smash Bros. dojo..
But it's up to each developer, I kind of like the idea they're not being forced by suggestion to do things like these. And besides, companies that run on creativity, not piles of resources and red cash, need to keep their 'easy to copy' secrets relatively safe.
Also, it only makes sense for very few games I believe. Most people either have short attention spans or they're not all in on information, so it's not that effective in terms of marketing for most games. I think it could be a good opportunity for relatively new developers though.







