Still questioning. A Sony employee retweeting the news doesn't make it a confirmation.
Let's talk about Sony hierarchy for their entertainment branch, shall we?
So at the top is the CEO of all of Sony, Kaz Hirai.
1.
Corporation CEO
CEO of Sony, Chairman - Kaz Hirai
2.
Entertainment Branch CEO
President, Group CEO of Sony Computer Entertainment (SCE) - Andrew House
3.
Entertainment Branch Subsidiaries CEOs
Jack Tretton (President and CEO, SCEA)
Jim Ryan (President and CEO, SCEE)
Shuhei Yoshida (President, SCE WWS)
^ So "the random employee who tweeted the news" just happens to be the #3. chain of command when it comes to Sony's entertainment division.
He was probably the one who made the decision first place. The guy is a really, really big deal. He is at an immensely high level position at Sony, and anything he says is law.