Lets assume they'll bring back all the Legendaries to let you complete the dex in one gen like in Gen 6, how would you go about spreading them out?
Or which legendaries do you want in the game if not all of them

Kyogre - Seaward Cave
Groudon - Blush Mountain
Rayquaza - Mt. Hokulani
Dialga, Palkia, Giratina - Ultra Space
Ho-oh, Legendary Beasts - Maie Garden
Lugia - Secluded Shore
Musketeers - Poni Plains
Heatran - Wela Volcano
Cresselia - Lake of the Moone
Zapdos - Geothermal Powerplant
Genies - Po Town
etc.