I can´t tell you when that will be, but based on what happened today, I can tell you that for some people it will feel like "as if millions of voices suddenly cried out in terror and were suddenly silenced."
Except for the silenced part.
Don´t expect much silence.
No clue. My assumption is that they're waiting until more rules are written and checked before opening it up. It makes sense that they'll want a choice of modules available, so both 4e and old school fans can use rules that support them.
With the 'leak' of fake info I would hope sooner rather than later, or at least release some more hard info sooner. Anyone with an anti-WotC grudge can release like that fake and cause all sorts of internet damage.