I also thought Vulturemon, but there is no way Vulturemon would be firing knives. So def has to be Sealdramon considering he has a red scanning eye and a hunter's knife.The dead will begin! Monitamon surprised me, future supporting character in sight?
For the enemy, I first thought of Vulture then of Astamon and then a person said a name and it hit the mark: The enemy might be Sealsdramon.
I mean, Sealsdramon has a cybernetic eye that scans its targets: the laser pointer seen in the preview = Check
He uses army knives: Knife = Check
Sealsdramon is described as a digimon whose primary function is assassination: executor = Check