This is not XCOM.
This has nothing to do with anything resembling XCOM apart from the basic concept of "dudes shoot aliens with guns". So, why bother with the XCOM name? Perhaps as means of hopefully ensuring that their new IP doesn't tank out of the door; by using an older, more familiar, IP's name to grab people's attention?
That aside, I'll just judge the game based on it's own merit and what has been put on display so far. I'm loving the environments in that trailer, as well as that disassembling (I guess?) effect from the alien errr...craft. Impressive in both quality and style. And that... is about it.
I guess that black tar crap from Pirates of Dark Water is pissed that its show was canceled because it is out for VENGENCE. Fighting blobs of unrecognizable black splooge is not something that I would consider very enticing. Okay so we have sentient tar as an enemy, and I'm guessing possessed/zombified humans along with various geometric shapes to round out the rest of this games list of baddies? As for the rest, standard fps stuff not trying very hard to set itself apart from what has come before it.
While I'm sure there is going to be more to it than all that, I just can't place much confidence in this debut trailer. If this were an original IP, I probably would be quite interested in what it has to offer. However, it claims to be the successor to a series that I really enjoyed back in its day. Because of that and it having nothing resembling original XCOM's feel/gameplay, I find myself being far more critical of it than something original.