Contract will be signed at Aero India 2021 in early Feb. don't worry, the IAF is as eager to get the contract signed. With CCS approval, all hurdles are cleared now.Well lets wait for the contract to be signed than.
Currently HAL can produce 10-12 Tejas fighters per year. But a new facility is being built which is to be operational by 2021 where 8 more will be assembled. Target for the Mk1A is 16 per year.20 jets per year is a bollywood Fantasy. I guess Adani and Ambani or other Corporates will jump in to milk the Indian Cow.
But given how HAL has moved away from being the only production agency to being an integrator, scaling up the production numbers is possible.
And no, neither Adani nor Ambani have any skin in this game.
It is VEM Tech, L&T, Dynamatics and Alpha Tocol which will do the work from the private sector. Dynamatics and Alpha Tocol have already built and certified the full aft and front fuselage for the Tejas Mk1. and the last IOC fighters were flying with wings built by L&T. So it should be possible to scale up production to even 24 per year if the order size is big enough.