Well, I liked ID4 for all its faults, so long as I turned my brain off and didn't think about it too much...wouldn't a spaceship 1/4th of the moon's mass drastically alter the Earth and Moon's rotation? And wouldn't a 15 kilometer spaceship kind of do something wherever it was hovering over Earth without having to open its death ray?...ooh, Will Smith's blowing some stuff up!"
It'll be interesting to see what they do. And they'd better have President Lone Starr in this one
Of course, I wonder how he's going to top himself after destroying the Earth in Day after Tomorrow and 2012. The aliens wont have much left to invade, unless they have a Death Star enroute to Earth.