I think it's a good domain and easy to remember. You probably won't have too many problems with sony and trademarks unless your website becomes big and your making like a ton of money.
I think in reality companies should be happy you are making sites about their product. I think it encourages the users of the game to enjoy the product they created. It's also free advertising.
I say rank on the serps for long-tail keywords to get traffic. I don't know of many ways to get traffic without doing something daily to maintain it besides seo traffic.