"Develop a comprehensive workflow for generating marketing banners using DALL-E that ensures both visual impact and brand consistency. This workflow should be designed for intermediate-level users who have a foundational understanding of design principles but are eager to explore advanced techniques to elevate their banner designs. The workflow should include detailed, imaginative, and step-by-step guidance, offering a variety of creative suggestions and examples to inspire users. Focus on fostering a professional yet creative approach, encouraging users to think outside the box while maintaining alignment with their brand identity and marketing objectives. Ensure the workflow is structured to maximize engagement and provide actionable insights for crafting visually appealing banners."