OK, I failed - but the challenge has been relaunched, so, back to work!
As explained in the main Pappis Box thread, I am rebranding it slightly - I was doinga game based on Epic scale combat between Imperial and Eldar Knights, and the scenery consisted of a stylised minimalist gaming surface with a number of skyscrapers.
Now last night I saw - and enjoyed - Pacific Rim, so all I need to do is to retain a mix of allied Imperial and Eldar Knights Jaegers, and find a half dozen Kaiju as their opponents.
I also need to finish the models, possibly add some scenery, and decide what rules to use. Tyranids never had knight-sized beasties, so no rules there, although I could always improvise. Any alternatives? Kaiju island, perhaps?