Quoted from the following link
on financial express.
"It may be mentioned that the TIAH project had been given a techno-
feasibility approval way back in 2003. However, with the Delhi airport
being handed over to private hands, the GMR group-backed Delhi
International Airport (DIAL) floated the argument that the new airport
would take away a majority of its air traffic.
However, despite the Uttar Pradesh government’s assertions that it
would accept and abide by all the contractual agreements that have
been entered in to by the Centre, the attorney general of India has
told the Centre that setting up a greenfield airport in Greater Noida
on the outskirts of New Delhi would clearly violate the agreement
signed between the GMR group-led consortium upgrading the Capital’s
Indira Gandhi International Airport and the ministry of civil
aviation. This effectively put the proposed Rs 5,000-crore Taj
International Aviation Hub at Jewar in Greater Noida in cold storage."
Doesn't sound very promising.
Before earlier I had read that since the central government allowed a
new airport at Mumbai withen the 150 km radius of the existing one so
the Jewar airport has a perfect chance to see a daylight.
I hope there is some way out .