This is coming from multiple sources. It can always slip, but that's the date to watch.Some think the leaked provisions may be exaggerated to lower expectations. First hearing may be on 4/25. Committee markup in may. Senate floor vote in June. House may wait until July to see how things go in the Senate.

A few things we're hearing -

New green card category based on merit factors (may be replacing the lottery)

Spouses and children of green card holders will be immediate relatives

Cut off date for legalization program will be for those who entered before the end of 2011

New anti-staffing company provisions in various employment-based visa categories

All backlogged family cases will be cleared within ten years.

Legalized applicants will be able to file green cards in ten years and for citizenship three years later

Benchmarks for enforcement will need to be hit, though there may be some flexibility there