Organising legendary events?

So anyone in Australia has to fly from state to state to get to a major city in order to get a different legendary.
That is going to get expensive in flights, as no other method of travel will make it possible to get them all.

No thanks.

...and that is just Australia.

For somewhere like Singapore, (or many countries around the world) how do you move the next legendary to a different city next week?

The plan for one country/city/region will need to be different to that of any other.
This is part of the difficulty - one design idea will NOT fit every country in the world.

For some regions, travelling abroad is an hour drive - for others it involves hours of flying.

Someone mentioned a nice way to introduce Entai. Catching all unknowns will grand you with this mystical beast. As they are very rare I think this would be a good way to introduce him.

Regarding Raiko and Suiqoune, I wouldn't complain if there is only 1 world wide at certain places. Making it almost impossible to find, but imo legendaries shouldn't be easy like that.

I think Niantic gonna take the movies as reference to put this mons in the map.

Mew and Mewtwo, like the first movie.
Legendary birds with Lugia, like Pokémon 2000 movie.
Ho-oh and the dogs like the main gold and silver.

Then, the other legendaries will come like the main games series.

If they decide to have them spawn all over the world I think it could only work if they spawn for only like 5 minutes. So you basically have to be lucky in the right place at the right time. Otherwise cheaters will win. F that.

Ingress, the game PoGo was modeled after, also has events. See link below. They require signing up for and going to a place where the event is held. Like PoGO, Ingress has spoofers as well and these events are designed to reward players who come to the event. I think Niantic would like to do something similar. The issue is 100K+ people might show up so its not so easy to set up.
https://www.ingress.com/events