Read my signature.
Titan will be a success no matter what.
Half, maybe more, of WOW subscribers are based in China that do not pay a monthly subscription fee but instead pay per minute with time cards which results in a much lower revenue figure per account than western subs.
The link you provided shows Activision Blizzard's total revenue not Blizzard. Also the $4.5 billion is ATVI's YEARLY revenue not quarterly. I have no idea where you got the figure of $338 million for WOW's subscription revenue from as it appears nowhere in either of your links. The actual figures for WOW in Q4 were $198 million which includes the cash shop as as well as any box sales.
The article relating to Take Two estimates there total yearly revenue at $2.35+ billion which is over double that of Blizzard's 2013 total of $1.124 billion.
Nope. WoW is on top because it found that virgin territory of casual MMO gamers and gobbled it up ASAP, and remained king of the hill by keeping a standard of quality in a small market. That market has since grown far beyond Blizzard's ability to control, and their attempts to please as many types of gamers as possible have only slowed the inevitable sub loss. More and more people are gravitating away for different styles of MMO, different kinds of games entirely. Eventually, that height in the market will diminish like a mountain slowly dug down and spread around evenly in the surrounding flatland.