Thats all we know at the moment, and it applies to Diablo3 as well im sure.
Not a single other thing has been mentioned
Based on Friskydingo's reminder of that I will add that it is probable that Blizzard will add some 'downloadable content' that you can choose to buy for whatever price. Also, chances are that if you dont purchase the DLC your gaming experience from that point on will be much less cool than everyone else who just forked over the $10. My RNG meter is telling me that there will be 3-4 of these per year at anywhere from $5-$15.
Q u o t e:
Sure they produced some doodoo games over 20 years ago