The thing I love about the Pokémon Kingdom leak:
You start in a new region, but you go back to an old region as well later on. There are a number of new Pokémon, including ones related to past Generations, such as Eevee. About 90% of existing Pokémon are available as well, and the campaign is spread across the entire map. In addition, the new mechanics are focused on bonding with your Pokémon.
I didn't just describe Kingdom. I described Generation II.
The only difference here is that Kingdom also promises altered experience mechanics (which we all know Gen II needed, anyway...) and is based partly (though not exclusively) on Pokémon's version of Japan, which means there are four canon regions to revisit, not just one.
Let me rephrase.
It's Generation II.
Times four.
It's Generation VIII.
[okay actually we all know it's fake but I just thought that was a funny observation]