I totally forgot about that, good catch.
I also forgot that leopard was dominant. That makes it difficult to find a super leopard. Don't you mean that spotnose is incomplete dominant? There aren't any co-dominant ball python morphs.
With that said a good pairing would be a leopard clown x spotnose clown. That will give you 25% batmans. If one of them is only het clown then there is a 12.5% chance per egg of getting a batman. To increase chances you could pair a leopard clown to a spotnose leopard clown. Then 37.5% of the babies will be batman.