What makes you think they would collide again. As they are drifting away, they would continue to drift. All continents would further be broken down and India too will have North india and South india with Bihar in no mans land (in between the two) and neither the north nor south would want to accept any responsibilty for it. Its highly unlikely that they would collide and form a single mass. They would disintegrate and get submerged in a billion years from now. Hope to see you sinking then.
