I've had an opportunity to build a fairly detailed instructable combining an EV3 with a Minecraft Creeper. Most o the LEGO portion is hidden underneath a large foam core body.
Build Link: http://goo.gl/utBkd4
Intro Video: https://www.youtube.com/watch?v=nz9HFUKyOlY

I'm kind of curious to know if there are any forums/groups for people that mash LEGO pieces with non LEGO or LEGO like pieces?
Also, feedback on the build/instructable would be greatly appreciated!
I would love to include this in one large EV3 Project file, but the 30mb limit makes for some interesting constraints : )
Thanks!