Heya! I believe Avery was planning on releasing the submission forms closer to the date planned for the bundle. I'll be sure to come back and find you around late September to give you the link once the form has been drafted and is ready for the public. Thank you for the eagerness to join in! If you feel like your work usually falls under the category anyways, I highly recommend submitting one of your works as the Jam allows for already created/older projects to be submitted!
Hopefully this helps!