The funny thing about the blockbuster model is that if we consider console gaming as we do film, the major video game publishers would end up being Activision, EA, Ubisoft, Nintendo, Take-Two, Microsoft and Sony in that order. Together, those seven companies own nearly 75% of the marketshare for 2012 and three of them create all the major gaming platforms outside of the mobile market. This is of course slightly less than the nearly 80% and nearly 90% which the six major film studios and three major record labels control respectfully. As for why I've stopped at seven? I wanted to include Microsoft and Sony because of their hardware maker status, and the eighth largest publisher in terms of market share this year was THQ and well, we can't really consider a bankrupt, defunct company as a major publisher now can we? However, if video games were to really consolidate, it would be around those seven companies most likely.
Even if video games adopt a studio system like film, Nintendo would likely be one of those studios, so EA will likely have to deal with Nintendo's continued existence in the market.