Give your personal worst case scenarios and your best case scenarios.
My personal worst-case scenario:
"We heard your complaints about the less-than-stellar quality of Pokemon Sword and Shield.
However, we will not listen.
For Time Diamond and Space Pearl, we have "added" some "improvements" to the formula. For one thing, we removed the bicycle, as it was deemed "unnecessary". Also, Barry will interrupt your journey all the time to remind you of things you already know, such as type weaknesses. There's no battle frontier, and there's not even anything remotely like the battle tower. We have made all routes into linear hallways. All gyms will be devoid of their charm.
Also, we removed Looker.
You'll buy our games anyway, regardless if they're shit, so give us your money.
You suckers.
Sincerely,
The Pokemon Company International"
My personal best-case scenario:
>Basically everything HGSS did for GSC, but for DPPt