The return to the world of Tom Clancy-based video games has been greeted with a generally positive reception (Destructoid loved it), and it's hard not think things like the following parody won't hurt, either. When people care enough to make these entertaining mash-ups, one could argue you've already succeeded. Furthermore, it's also logical to think creations like these help as much, if not more, than the actual marketing campaign.
Considering the futuristic tech that's on display in the game, the key is transferring that over to a real world setting, and IGN succeeded:
With over 100,000 views, and close to 5000 likes, as opposed to 116 dislikes, the Ghost Recon: Future Intern parody does its job very well, but don't take my word for it. Check it out if you haven't already.