I've mentioned it on voice chat but my ideal Hollow Knight fangame is a Zote game, as recalled by Zote

Zote's story as Zote remembers it

it's half HK, half character action game

with a style meter and absurdly flashy combat

co-starring the Knight as the Vergil to your Dante

the final boss is what Zote imagines the Radiance is/looks like from hearing about it third-hand after the fact

completely factually inaccurate throughout

three Knight fights, two where you save his life and a third in the coliseum

Oh my God. Amazing.