From the platform of Lalu Prasad's grand anti-BJP rally in Patna today, Sharad Yadav today promised a pan-India Grand Alliance that would take on the BJP at the next general election. But the promised mega-platform of the opposition at Patna's Gandhi Maidan had shrunk, with some of the key opposition leaders, including Congress's Sonia Gandhi, Rahul Gandhi and Dalit powerhouse Mayawati giving it a miss.