Lol, I already said that!
It's DP's 10th anniversary so it could be a homage, or a hint for DP remakes, or both. The color schemes of the Mortality trio to some were hints of Hoenn remakes. While Platinum was treated as a hint of Johto remakes due to being the first game named after a metal in 2 gens.
Alola is similar to Hoenn, but it's different looking at the same time. There's an island with only one town, but unlike Mossdeep or Sootopolis cities doesn't cover most of the island. Plus the region has ice at the top (which is more similar to Mt. Coronet).
As for the plot...I hope it's more than Eternal Day and Eternal Night, that's worse than wanting more land for people and mons to live on, or extending the sea to punish humans and return the world to a primal state.
Perhaps Eternal Night could involve casting a sleeping spell on the entire region and giving them illusions of a better world, like the Eternal Tsukuyomi (btw which happens to be named after the Shinto Moon God) Jutsu in Naruto, of course with the legendary absorbing some power ala Darkrai. Hmm, maybe a Sun team could want to burn up the world in a mass scale murder suicide.