NO.
Do NOT buy the DVD...
At least not yet. There are no special features at all on it.
There will most likely be a huge DVD pack with 'Flags' and 'Iwo Jima' that has a TON of special features.
So, if you just want the film and nothing else... by all means, get it. But, just thought I would let you know that when 'Iwo' is released on DVD there will most likely be a huge "double dip" for the film on DVD.