Base off a idea from Joshua Ben Ari...
What if Iskander Mirza and Ayub Khan had come to blows and the 1958 coup d'etat collapsed into a civil war. Bangladesh goes on to declared independence and neutrality, while India annex Sindh, some of Punjab and Kashmir.
What happens now? How will the fall of Pakistan affect the Muslim World? What will the US do with the end of Pakistan and the lost of a Ally in Asia? And India with its biggest rival (Besides China.) going to hell, and the Hindus getting what it always wanted.