New incisions for 2nd breast augmentation - potential problems with parallel scars? (Photo)

I want to reimplant (it has been 4 years since my implants were removed). My old incisions are 2 cm's under my natural creases. If I have new incisions in my natural creases, which will create parallel scars under both breasts, will the skin between the two parallel scars bulge out, or is there any problem that will arise from having new incisions in my natural creases?