A little more on Nair
This from New Kerala News
As for the much-hyped reports about her being asked to direct the fifth segment of the Harry Potter series, Nair is reluctant to discuss it. Though she doesn't deny the fact that she has been approached, Nair said: "Right now it's too early to talk about it. I don't know how it got out on the websites. I have to sit with them and work out the dates. "Until then I am forbidden from talking about it. Right now I'm fully into 'The Namesake' and looking forward to meeting up with Rani."

Well, it's obvious she doesn't know what she's getting into, by not knowing the resourcefullness of Harry Potter fans. I'm guessing some sites knew about her wanted for the fifth movie before she did.
Though the fourth movie has really only just begun filming a short while back, it appears that WB wishes to push through all the movies quickly. It seems if it takes too long to be made, that the only smart option would be to take the Lord of the Rings way. And film more than one movie at a time. So as to not lose some of the actors as well as time and money.
Here's to hoping WB can keep the main cast perfectly happy and where they are. ;)