Significance of the Forward Unto Dawn?

What exactly is significant about the Forward Unto Dawn that 343 is using it as a marketing promotion? I thought Halo 4 revolved around the Infinity. In the FuD series, the main character Lasky ends up as an officer on the Infinity. The special Halo 4 Mega Bloks set is the Forward Unto Dawn, rather than the Infinity. All we see about the ship (without any recent spoilers) is that half of it’s been floating in space for years and then it crashes into a planet. So what’s special about it?

Nothing. They’ve said they just thought it was a cool name that was metaphoric for the next phase of the Halo universe.

And it just also happened to already be established in the canon, specifically Halo 4 itself.