I'm thinking of otoplasty but I fear it may go wrong and my ears will look worse. What happens if it does go wrong? (photo)

 When performing otoplasty, look for a surgeon who has lots of before-and-after  photographs for best results.  The Otoplasty procedure can be performed under local anesthesia as an outpatient surgical procedure

All depends on which technique is used and the skill of the surgeon.  Different techniques are more reversible than others (some are completely irreversible).  If the surgeon is skilled enough, then it should not matter as much what technique is used since they will be able to solve any problems that may arise.  However, even a skilled surgeon will struggle to fix/reverse problems after procedures involving removal/cutting of the cartilage.  The flip side of this is that procedures which are more reversible (generally involving the use of sutures only) also have a greater risk of recurrence of the original prominence.  So, it all depends.....