Agreed on all points.
Paramount will certainly want this in the $700m+ super league and the 3D push is probably the key.
If there's a problem in the mix, it's maybe with the film itself.
Is this meant to be satirical in some way, or just laugh out loud funny?
$700m gross? I just puddled laughing so hard. Darkness will probably take less than the last film (about $375m from memory) due to all the fans who didn't like it not giving Abrams another hearing. The "problem" is that the film is Star Trek. It's that simple. The film could be exceptionally good, but it won't even register on the radar of most cinema goers because of its label.
If Paramount calls the film Transformers: In To Darkness
, then you're looking at a billion dollar gross.