Alright, what do YOU want from the next Zelda game? The BotW format is here to stay but there's going to be a new rendition of Hyrule and so on.
>Zonai tech will return, but reskinned into something else
>Korok seeds will return but reskinned into something else. Ideally, there will be less of them
>More weapon types, actual hammers, actual magical rods and a magic meter
>Weapon durability based on Monster Hunter's system, you sharpen your weapons with a whetstone to maintain them, no more weapons breaking
>Throwing weapons are now a thing, like throwing knives or axes, can be stacked
>Rupees can be used to upgrade weapons or enchant them
>Slightly smaller map, but more connected with an underground complex, an actual complex and not an inverse map of the overworld
>Dungeons that aren't just activate five switches
>More giant bosses, some unique to certain regions
Or just do another Wind Waker with a map the size of BotW/TotK. Building boats in TotK was actually fun.