Per this link, Warne has expressed interest in coaching India. Warney and Kohli will make an interesting pair.. I have often believed that if India has to start winning series overseas, their coach needs to be someone who has won test matches in non-subcontinental conditions as a bowler. With that in mind, Shane Keith Warne will actually be good for India, especially for the Test team. And no, Anil Kumble or Kapil Dev have not won matches consistently for India overseas, and will not know what to do (KDev has tried and failed once).
Kohli is much the gambler , like Warney. He isn't averse to losing matches in pursuit of a win (remember Adelaide?). A strategist like Warne might be perfect for him. They both can set specific goals for the bowlers and work their way around it. Also, unlike 2005 when "Guru Greg" was regarded a dictator, Indian players of recent stock are ready and willing to embrace the "Australian way" or any other way that modern coaching brings with it. Players are younger, fitter, less "hierarchy conscious" with most players being about the same age-group, unlike in the Tendulkar-Dravid era (read Chappell).
Worth a try! And it will make Marlon Samuels happy since Warney won't be commentating