I have this scar on my lower right chest. Can I have abdominoplasty? (Photo)

The scar that you have could put you at greater risk of healing complications as the blood supply to the abdomen may be more compromised due to your previous surgery (assuming an open gall bladder surgery). All of the surgeons it seems acknowledged the risk, it's just that there was a variety of opinions on if the risk was too great.

Yes you would be at extra risk of tissue necrosis. Your scar may be more favorable from what other patients have, but necrosis would be hard to predict. you may consider other procedures perhaps using upper full abdominal liposuction and lower abdominal skin excision.