What do you mean? Why do another The Thing or why before Alien.
LOL...I meant why do another

I've heard it could be the Norweigans story but I'm not convinced filming will start (as I'm not convinced Alien 5 and Pred 3 will actually make it to screen) these are just rumours and scripts being thrown around.
I've been hearing rumours of the norwegians story for the last 8 years or so, didn't think they'd actually progressed into writing a script for this or putting it into pre-production.
Directors make a huge difference to a film. You can pretty much tell a Scott film even if you don't know its one of his. Similarly if the camera is moving far too fast, the scenes cut every few seconds and the camera appears constantly pointing in the wrong direction and theres no sense of distance and time then odds on its Michael Bay.
As someone else said, with Scott in charge this film will at the very least be decent, he simply wouldn't let a film he's not happy with be released.