Final Fantasy XV
I'd been following the game's sporadic development all the way from when it was first shown as Final Fantasy Versus XIII, and it's great to see it finally moving towards release and getting the full-fledged entry status it deserves, as opposed to being a spin-off of the terrible FFXIII.
Runner-up: inFamous Second Son
inFamous was one of my favorite new IPs of this gen and the PS4 follow-up looks like it will blow the lid off of everything I loved about those games.
Second runner-up: Destiny
It's a new and untested IP, and I wasn't the biggest Halo fan, but Borderlands with a focus exploration and an amazing sci-fi setting? Sign me up.
Honorable mention: Kingdom Hearts III
They showed almost nothing and it will still probably be years before full release, but it's good to see the thing actually exists. I was a huge fan of the series before it went into handheld spin-off purgatory, and now I just may be brought back into the hype and excitement I felt in the lead-up to KHII.