After some wait, the stream information regarding Tougeki -Super Battle Opera- 2012 is revealed.
The stream will be on Japanese video site NicoNico Douga. The stream will be seperate for the Game Summer Festival umbrella event so don't expect unusual games to appear. Each individual day will be priced at around 1,500 yen (approx. $19) while paying for both days will cost at 2,500 yen (approx. $30). Only portions of the event will be streamed for free while paying will provide the full experience.
If you are interested in seeing your fellow international Ultimate Marvel vs. Capcom 3 players compete, witnessing another year of Street Fighter III: 3rd Strike in Tougeki or just want to enjoy the overall experience, make sure to check out this guide by Fubarduck in how to pay for NicoNico points and go to this page to make your purchase (both indivdual day and weekend packages).