That's the theory, but it doesn't align with reality. First, all of the mass in the universe won't fit into space the size of a marble. Second, all of the mass in that small of a space would have a gravity so large as to preclude any expansion or inflation. Third, all that theory is really doing is trying to explain away "why" matter in large clumps (read: planets and stars from each other) is currently getting farther apart...while ignoring that matter in large clumps per se is staying the same size (e.g. the Earth isn't expanding).
The current "big bang inflation" theories all want to pretend, in other words, that the space between planets and stars is expanding...while the space between atoms in planets (e.g. our Earth) is remaining the same size (otherwise the Earth would be growing).
Which is to say, the theory is hooey.