for the potential new hero that could be coming ik theyd be involved in a different clan of japan but id like to see the character be able to wall climb. However if thats something they wanted to reserve for the shimada clan i think itd be really cool if blizzard gave the new clan a shared passive as well. granted wed have to wait for a second hero from her clan to emerge as a hero to get another one with the ability but i think itd be an interesting aspect to character story and design.
TL:DR: since genji and hanzo share two similar abilities being wall climb and a variant of double jump itd be cool if they gave the new clan shared passive and abilities as well just showing they that each clan has specific fighting techniques that the others cant neccesarily master