How would this scar/overhang be fixed and will I need another full tummy tuck? (Photos)

First of all, I would ask your gynecologist why in the world he or she didn’t just use your previous incision. I cannot think of any good reason for this, and it put the skin between the incisions at risk for necrosis. Now, you have these two scars on each side and the only way to really surgically correct this is to remove the skin and the remainder of an ellipse of skin further out to the side laterally. This would result in a longer, but single, scar.  

Hello.
Great question. Thank you for your question. Based on your images, it appears you may benefit from a full tummy tuck procedure to aid in your bulge, bely button and scar. Please visit a board certified plastic surgeon for a detailed surgical plan to achieve your desired results. 

Dear Stainless,
based on your photos, it looks like you would need scar revision in order to get better results. If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery