I tried to do this once, I built a controlable Logan and Emmet bot then just gave up, all those logic gates man!
Once its released I'll heart, like and comment on it to try get it too the "Cool Level Page" even though all thats in there is a massive spam of those Mortal Kombat levels.
Nice, I was going to make a Warkawk level back during LBP 1 but air flight was not possible. I did make a multiplayer level with jats, helis, dual helis, subs, bosts, bombers, hovercrafts, aircraftcarrier, and some massive weapons, but the biggest issue was thermo and camera (if you make it vs you can each have a cam excluding movie, but that affects spawn points and other things). Did you use the 3D glitch? It will allow you to cheat you backgrounds so your vehicles can take up a bit more space. Definately will play it when I have a chance, and if you need some vehicles or such I could give it a go, I have a little free time. I wouldn't mind building a dropship using the concept art they released for Starhawk...but I would need to know your control scheme to make it match (.i.e. which button for fire, exit, etc.).