Great start, awesome idea! Definitely need all the Xenos maps from all the various codexes (Lexicanum usually clarifies which codex has the most recent map for each, IME). The crown jewel, ofc, is to see the Tyranid fleets hitting the galaxy from two sides and then below, then zooming out to reveal the oncoming mass, still flying through the void towards us from Andromeda... Terrifying!

UI wise, there's definitely a sense of latency when just moving my mouse around. Obviously 3D (three.js?) has FPS limits, but this should be preventable. Also, a lot of the text overlaps on my random (medium sized) browser window.

EDIT: Also you gotta take the stars outta the intergalactic void! Would be much cooler to see the occasional super distance galaxy, anyway ;)