That would be the dream.Some diehard fans hate hearing this, but I agree with you. Breath of the Wild should inspire future entries in the series, as long as they don't give up the turn-based combat. Pokemon's combat is the heart of the series IMO--approachable for kids and casual fans like me, but deep enough to host tournaments of experts year after year. You don't throw that out lightly (NOTE: that's not what I think you're asking for, but I think that's what a lot of people hear when we say, "Make it like BotW").
Pokemon doesn't need Breath of the Wild's mechanics--climbing, physics, realtime combat, etc.--but if Gamefreak took the BotW engine and used it to build a Pokemon with that sense of scale and freedom to explore? That game would be phenomenal.