Some of the updates coming with the Steam Greenlight thing includes tougher versions of the bosses, returning bosses from EBF2 and EBF3. And you get to fight evil copies of Lance, Matt, Anna, and Natalie.
Tips for EBF5: Love story between Matt and Natalie. Make the final Boss battle against evil clones of our beloved protagonists(Every good game series needs to include evil copies). Backstories: We know almost NOTHING of Matt, Natalie, Lance, and Anna's histories(Families, Childhoods, what pushed them to become the grand warriors they are today.[This could be achieved through a Prequel])