A brand new engine was desperately needed. Hopefully it's well optimised and we don't have to pay for actually decent graphics with shocking performance. Game Freak's technical ability has been extremely lacking recently but this new engine gives them a fresh shot if proving themselves.
Wind/Waves looks very interesting. Not mentioned in OP but I saw the leak mention procedural generation. With the theme of infinity and exploration I'm thinking they'll have randomly generated islands you can visit.
I think this is just new information from the previous hack? The one that said Z-A was coming in 2024 and had footage of rideable Pokémon. So obviously the further out the game the greater chance things have changed by then.
With that image saying Z-A (ikaku) was late 2024, chances are some of the other games will also be delayed.
