What Can I Do for my Stomach?

Your tummy tuck would have to be modified because of your scar.  It is hard to say from the photo but you might do well with a standard tummy tuck depending  upon how deep your were cut from the previous injury.  You just need to see a board certified PS and get a good physical exam.

I agree that your case is a bit more challenging for several reasons...You do have loose skin but not really drooping skin. I think you would benefit from abdominal wall tightening and skin as well, but I think you will still have a vertical scar from your belly button down low on your tummy. And then there is the complication from the scar across your tummy which can change the circulation to your tummy skin making healing unpredictable...This is the time to find a surgeon with a lot of tummy experience...

From the photos it looks like you should expect a great improvement from a tummy tuck. Because of the scar that is present there may be some variations in the classic technique, and these would be reviewed at the time of consultation. 

When you are ready for an in person consultation, RealSelf has listings of surgeons in your area. You should consider cross referencing the listings from the The American Society of Plastic Surgeons (plasticsurgery dot org). A listing in the ASPS website assures you that your surgeon is not only board certified,  but also is a member in good standing of the major plastic surgery organization in the U. S. Thank you for your question, best wishes.