Before I would go through all the trouble of taking it out, I would see if ironing it with a little bit of steam would straighten it out. Since it is only in this section, it would be practical to try a small part of the section. If it looks good after you do a very little section, then steam iron the whole section that is puckered. Be sure that the steam is not too hot.
Not knowing what your sewing machine is like when it sews, it looks to me that your stitch size maybe too small. I would enlarge the stitch a bit next time. I would also try using the same fabric and batting and do a sample piece to see if enlarging the stitch would help this problem. That way you see if this solves this problem for next time.
I also noticed that in the lower right hand corner of the picture that your top thread is coming through. You may also want to loosen the tension just a bit. Make sure you note where the tension is before you start changing anything. I usually write it down on a piece of paper, so that I don't forget and can put the tension back to where it started when you finish the project. Ask me how I know this... my mind can be a steel trap somedays and other days it is like a colander.