Firms that didn't win the project had proposed extending the Central Vista up to the banks of Yamuna, converting North and South Blocks into archival spaces, the Parliament building into a museum and erecting a new obelisk akin to the Washington Monument overlooking the Rajpath. 
This firm CP Kukreja Architects had proposed that the Central Vista would run from the Yamuna in the east to the Delhi Ridge. It also proposed the creation of a pair of “semi-public” streets that would run between the buildings with a new underground Metro route connecting CV.
New Delhi based Sikka Associates Architects had also proposed a mono rail loop around central vista, public plazas with underground traffic interchange, new Sandad Bhawan next to a new office building for PMO and a 'garden of peace' among others.
Another Gujarat based firm INI Design Studio had proposed to “restore” the present Parliament building along with the North, South Blocks as the “Museum of Indian Democracy”, library and archival spaces. Also suggested the creation of a new space, Ganntantra Chowk for ceremonies
I have no idea what this firm—Arcop Associates wanted to say
Bombay based Hafeez contractor wanted a giant lotus structure in the middle of the Rajpath centered in concentric circle made of more lotuses. His proposal was disqualified after the first round.
This is the design by the winning firm HCP Design.
