Since that pocket universe had done the allied front the favor of condensing its matter into a single location, the Leviathan-class ship headed for it, relying on the full capabilities of its engines to reach its top speed.
The trip didn't promise to be long, but it wasn't short, either, and both the Emperor and Khan eventually decided to enter the ship once it became clear that the vast expanse wouldn't pose new threats.
Besides, while both Khan and the Emperor could resist the space's deadliness to various degrees, that practice was tiring, and it was their duty to remain in top form before engaging in the final battle.
The allied front's preparations obviously included something that could contain the Emperor. Actually, that had been one of the main concerns since he was far more problematic than Khan.
