well lets take that it does happens so i guess pakistan will shift its Air Defence policy from Aircraft to Airdefence as we already know pakistan has purchased and tested the Vera system which can easily detect any stealth air craft so pakistan will buy a very good long range air defence SAM could be chinese Ft2000 or American Pac 3 as it will wait for JXX or the new version of Rafele , all this is hypothetical talk so just saying
P.s
india will never get jsf in there current mrca requirement as one of the main condition is Full TOT which i seriously doubt that America will be happy to give for jsf
!! and if AMERICANs are willing to do that then we have much bigger problem then JSf .