Hi,
in this case you can set a workflow in this section and do not publish promotion documents. Then on your home page you can use for example a repeater web part. It has a check box property
Select only published. If you uncheck this option, information from promotion documents will be displayed on a home page even they are not published.
For more details please take a look here:
Defining workflowBest regards,
Ivana Tomanickova