Black holes as a scientific aspect, are the most devastating things known to man. Plus the make up of the universe we inhabit will not allow two black holes to be within the same space as each other...They would attract and repell each other at the same rate...
The gravatational pull of the black holes creates the \'spewing\' effect we know.... This is when the particles that have been attracted into the black hole are \'spewed\' out from the other side as a stream of particles.
Wormholes if they did work and exist are a controlled point of space and time; if space as we know could be \'folded\', an access point from one time to another is theroetically possible (Read Hawking).
Imagine a \'rift\' of space, where all potential aspects of space and time are exposed to that rift...If it is controllable then interplane travel through the space time constant should be possible. Not including the radiation expose that will occur.
The problem behind this is that if two black holes were polarised to each other the matter which emerges is so dramatically changed it would not resemble the original matter. Unless you count dust
