What type combinations do you want to see?
Which concept would you apply them to?
What makes you seethe it hasn't been done before?
For me:
>no Electric/Fighting eventhough Electivire, Zeraora and Galar-Zapdos scream it from the top of their lungs
>no Fire/Grass chili pepper or charcoal based mon
>no Ice/Poison Galar-Dustox
At least this gen I got an Electric/Poison and a Bug/Ice I like.