At Spicejet, expat contracts that are coming up for renewal are being extended only until the DGCA deadline as the airline does not know how the DGCA will rule. In anycase, even if the airline were to renew a contract for 1-3 years, it really won't really mean much because ultimately the DGCA ruling will be controlling. Having a contract in hand will not mean much.
Spicejet has upgraded quite a few Indian candidates (some who jumped ship from other airlines) and right now Captain staffing seems quite adequate.
I think JetAirways, AirIndia and Indigo have quite a few expat Capts. Spicejet probably has around 50-60 if I am not mistaken. Usually on any given day, one-third or more are on their leave rotation (which is unpaid). In my opinion, in 12-18 months, the need for expats will be significantly reduced to probably 60% or less. I believe currently there are around 500 expats in India.