I completely missed seeing these. This was clearly not going to be another Delta Force game in anything but name - looks more like Joint Ops 2.
CryEngine 3... I'm guessing this would've been a disappointing release to us as DF fans. Their DFX series sure didn't play like the originals. The last solid DF game they released was BHD.
Looks like they'd tried a few different engines - presumably kept running into problems and ultimately ran out of money for development.
Would not be too surprised if they were shopping this around to investors at one time and were unable to find any because it looked like another generic shooter.