Nah, Indonesia won't buy J-31 / J-35. Right now, they just procure Rafale, and later on KF-21 Boromae. Indonesia doesn't has the gut to buy Flanker again, even when they thought that SU-27 and SU-30 were so good and fit to their need of Airforce. How can they procure J-31 / J-35 that come from US adversary? But even with that, they want to avoid to buy from US, too. So they choose to procure jet fighters from Europe instead.Indonesian economy is the 7th or 16th in the world...