Capcom released a financial report stating the approximate release 'date'. While there's still a lot of time between now and the end date of the financial report, it's at least nice to know that it won't take years before the game is released.
"According to a financial report Capcom put out, Street Fighter X Tekken will be released before the 2011 fiscal year ends, which is March 31, 2012.
The game is expected to sell 2 million copies, which was the same number of units Marvel vs. Capcom 3 ended up moving.
The other item of note is that Capcom plans to "Increase the number of home video games with DLC," and they will, "Provide downloadable content for all major titles for home video consoles." Street Fighter X Tekken should definitely fall into the category of a major title, so users can expect DLC in the future, after it is released."
Even though capcom is making a big load of fighting games, they're all selling quite well, especially considering that the fighting was supposed to be 'dead' a few years ago. I look forward to how big Capcom might become.