Board Thread:Warhammer 40k General Discussion/@comment-24037808-20140109121720/@comment-6078851-20140329003730

it's not implied, heavily or otherwise. it states in their codex that 'they are traveling from galaxy to galaxy devouring all, maybe heading towards something that we'll never know about, or it may be that they're running from something.'

i'm paraphrasing but that's all the mention of them running from anything, a single sentance that voices a possibility. if there is anything else that clearly implies that they're fleeing i'd like to know where, 'cause as much as i love tyranids i love even more the idea that they are in fact not the biggest, baddest, hungriest beasties on the block :)