Well, that has been the theory after all. It is currently the most prominent theory as presented by Stephen Hawking -that the universe resides in a state of absolute 0. Meaning, that it is completely balanced between positive and negative force, matter and antimatter. However, speaking of black holes, I would like to reveal something interesting.
First ask yourself this; What causes the planets to rotate around the sun?
The previous theory, one that was in effect when I was still in high school, was that the planets' momentum and the sun's gravity reached an equilibrium to produce a centrifugal balance. A bit of imagery to help picture this is a ball atatched to a piece of string being twirled about at high speeds. The string represents gravity, the ball represents earth, and the twirling represents the earth's momentum.
This theory is no longer considered possible.
The current theory is somewhat more complex. I'm not sure how well I understand it myself, but I will attempt to explain it to the best of my knowledge.
Okay, first consider this: Light is strongly theorized to move in a straight line. Light is also theorized to have no mass because the mass of an object reaches infinity at light speed. (To explain that would take many pages). Anyway, suffice it to say that light has no mass.
Therefore, if light has no mass, why does light fail to escape a black hole? Many tests have been done to judge the travels of light over enormous distances. Scientists would pick two points at an early traveling point in a beam of light, thus defining a straight line in euclidian space. They would then check many light years along this line to detect light, but have often found that light no longer traveled the line but instead bent to include other points. Tests have also shown that any time light nears a large celestial body, the straight path of light bends around the mass.
Now consider this imagery:
A sheet of linen cloth stretched taught across 4 points in a square shape. A weight is placed in the center of this cloth, and as a reaction, the cloth bends and forms a depression. If you were to place other lighter balls onto various points of this depression, with a bit of momentum you might find that they roll along the line of the depression in a spiral path slowly inclining towards the center. This cloth represents space, the heavy object in the center represents a body of mass.
This is the new imagery model for the planets and the sun approximately. The postulate is that light DOES travel in a straight path, however, because space-time itself warps in the presence of gravity, the straight path becomes distorted. The reason light cannot escape a black hole, is simply that a black hole has such great mass that it warps space-time to the point of directing all passing light into itself. It isn't sucking light in, it is warping the terrain of space. The cloth is space, and the heavy object in the center can simply be replaced with an immeasurably more heavy object, thus effectively representing a black hole, -an object so heavy that it just may tear a hole in the "fabric" of space.
In any case, don't take the imagery too seriously, because that is only a vague way of looking at it. The new imagery is CLOSER than the ball and string theory, but still so very far from the absolute truth. This is probably because a human mind cannot comprehend the truth, and therefore we create generic representations like imagery to help ourselves gain a vague understanding. ;)