Already posted, its all mere speculation. India will never go for F35. Plane is not mature yet. According to defense analyst in US, it will be matured after 2020. Plane still in testing phase. Number of European country already reduced the number. Lack of interest, more inclination to adopt unmanned aerial vehicles. Due to change in priorities , where enemy fight low key war. These heavy duty weapons only good for regional known confrontation. Where borders and enemy is visible.
Indian has best option of Rafale and Eurofighter. Both outclass F35 right now. As far F22, its so expensive , USAF has only 122. Now debate in senate , do America need this expensive plane ?.
As far as SU35, it seems some kinda bluff from Russia. World demand of fighter manned aircraft is heading toward its end. First countries has no money, second again priorities has change. Third when a drone with 6 hellfire perform a job, they why buy millions of dollar plane and pay another millions for its maintenance.