What inspires the title 'Ra.One'?

If you're one of those people who wonder what Shahrukh Khan's upcoming film title, Ra.One, is all about, here we

Recently at a press conference, SRK was heard giving examples of  Sholay, Mr.India and Sadak where the villainous characters, 'Gabbar', 'Mogambo' and 'Maharani' received extreme popularity and are remembered even today. Thus, he decided to name the film after the villain who's name is Ra.One.

Well, there's one more recent and popular film in the Bollywood which Shahrukh forgot to credit in his list of inspiration. Aamir Khan's runaway hit, Ghajini, where the title of the film was decided upon the name of the villain, i.e. Ghajini Dharmatma. 

For the records, the film is already creating huge vibes across the globe and has already acclaimed immense popularity with it being Shahrukh's first big release since February, '10.  The leak of one of the most hyped songs, Chammak Challo, has only added to its wide-spreading anticipation.