i lowkey want to write a crossover fic

so my idea is a kagehina steven universe au

where kageyama is greg

and hinata is rose

please i need feedback is this a good idea

for anyone who hasn't watched steven universe or they haven't gotten to the greg and rose back story kageyama's character is a hopeless broke rocker and hinata's character is a gem, which is basically an alien who has powers and on other planets their gem type classifies them in society but hinata and his group will be rougue and not care about society and it's kind of hard to explain but they have weapons they can summon and such and they can change form and they battle creatures and they can fuse with each other and it's amazing

and for anyone who has watched the show how about

dachi as ruby

sugawara as sapphire

asahi as pearl (but minus the pearl x rose thing, i'd show pearl's emotions through greg)

nishinoya as amethyst (but then pearl x amethyst i think yes)

comment or pm me ur thoughts? also if u've watched the show i will go to you to ask you about a million questions and opinions okay