The future of military tech is supposedly hypersonic missiles, stealth drones and suicide drones. I'm going with large-scale air force experiments with a new line of drones, possibly with a 'psy-op' angle. While the Democrats sabotage everything possible for the upcoming Orange-Man-Bad presidency (such as selling off portions of the border wall), they want to distract people with 'mysterious' unidentified aerial phenomena.
There be aliens/Iranian motherships launching drone squadrons/Chinese stealth balloons afoot.
(I haven't really spent much thought on this. In case you haven't noticed. ;) )
Don't forget "they're not a threat!"
If you want to connect some tin-foilery to the drone situation, NYC sources are muttering about a false/green flag. The drones could be priming people for a radiological scare, like a dirty bombing.
They are totally not a threat but congress totally needs to pass a law expanding our power to deal with this totally under control situation!
They aren't but something else is.