Currently you cannot change the accounts payable check format in QuickBooks. You can modify the Order, Invoice, Estimate, Statement, Financial Statements, etc.
Intuit does not pre-announce new features. Will this feature be in the next release? I think it should be to be consistent with the capability to modify the other forms.
When you enter a bill in QB you have the capability to enter a memo for each distribution line. It would be good to be able to print the memo and gl account used for each distribution line on the bottom check stub that is typically kept and filed.