Remember, Toshi is on the team. We'll be fighting a "Nier Automata"-esque Grummz Maid android before we know it. And my god she'll be the most 2D waifu there ever was.
It'd be cool to have ultra-rare special encounters that occur when certain conditions are met. Those Battlefield/CoD map secrets always interested me (watching them at least), and the amount of work that players put in to figure these things out is incredible.
Say there was a full moon every 7 day/night cycles, and in one of a bunch of different locations in the forest biomes (which include ones that haven't been terraformed and may be inaccessible), you can hear a distant, eerie howl-like sound. From there, you shoot the moon 666 times (so best do it with other players) and it opens a portal to a time rift. You get charges by hordes upon hordes of beast mode tsi-hu, streaming over the landscape towards you. If you die, you die. If you defeat them all, you get a werewolf/beast mode cosmetic.
Edit: re-read the thread, got carried away oops. Non-conventional enemies? Yeah, I'd love to walk into a bar and get shot at by vending machines, or face a giant rubber duck kaiju.