I was thinking about the various world encounters that could exist in SC.

Will there be wandering monsters on timers or special triggers?

It's be great to see a giant monster that appears in a park after you finish a mission in the park or exit a door from a mission in that zone.

Progress through a story where Dr. Transdimensional is tapping into Dimension 234 to bring minions to SC to fight for him. Defeat him as the boss in the story arc, as he falls he shouts "You're too late! I've opened the door, the great beast of Dimension 234 is on it's way! Maniacal laugh!"

You exit the door and when you load into the zone you trigger a portal appearing and a monster spawn that is announced in Zone chat.

You can defeat the monster and the portal closes or you can close the portal (interact or attack) and it lowers the monster's stats some making him a bit faster to defeat for say a small team. Could be on a timer or if one is active in a zone and someone completed the mission and exited into that zone in the last 5 minutes then you automatically go to a new instance of the zone or a different instance.

Also, it would be nice to see drones or even flying cars or something in their air. Having enemy drones you can fight while flying would be great and the option to buy a jetpack if you want (something temp you have to re-buy once fuel runs out or can craft) you can fly up an fight them.

A flying giant monster that randomly appears would be great too. It could even spawn variations based on area level range and appear in multiple locations.

I will say it's strange that at the end of the 21st century the only cars we've seen are designs that are from used car lots in 2016. More high concept designs like the crazy crap from auto shows would be nice or even some hover cars.