1 c-section, 1 vbac, 2+ years after c-section. During vbac, I had 60% placenta abruption, discovered after delivery. Mama and baby are fine 1 yr later. Risks for future vbacs if we get pregnant again?

You need to see MD. To identify your risk there are many questions and answers needed. There is a risk assessment questionnaire that your md will do and help you understand your risk.