It was posted on FlyerTalk earlier today that the Hyatt’s Spring 2013 promotion would be 3000 bonus points for every 3 nights for up to 45K bonus points (45 nights). The promotion would be valid for stays between march 1 and May 31, 2013, and the registration would open on February 15.
Please note that I have not yet independently been able to verify this promotion, but it sounds about right considering Hyatt’s offerings of late.
Conclusion
I will have an updated post as soon as I can confirm what the new promotion is.