If i am not mistaken you're tying to get GC for your parents thru your Aunt which is the category F4 of Brother/Sister of the US Citizen. You know how long it takes. National Visa Center (NVC) is processing the date of 22 JUL 2004 on F4 category now which is almost 14 years behind. so you can calculate if you start now then when the visa will available for you parents. the current tourist visa status and visa cancellation won't effect the immigration visa process.

check the link below for visa processing for family based process;

https://travel.state.gov/content/travel/en/legal/visa-law0/visa-bulletin/2018/visa-bulletin-for-february-2018.html