Cross post from the other thread:
Tony Williams' The Foresight War is basically a whiff WWII where both the British and the Germans have an advisor from the future. The question is not only what to do for the best, but what is the real motivation of the German advisor?
(http://quarryhs.co.uk/foresight-war.jpg)
http://www.amazon.co.uk/The-Foresight-War-Anthony-Williams/dp/0755201566 (http://www.amazon.co.uk/The-Foresight-War-Anthony-Williams/dp/0755201566)
http://quarryhs.co.uk/TFWreviews.htm (http://quarryhs.co.uk/TFWreviews.htm)
First two chapters here: http://quarryhs.co.uk/TFW%20Extract.htm (http://quarryhs.co.uk/TFW%20Extract.htm)
This book is basically a dramatised exposition of Tony's ideas about how WWII could and should have been fought, given the benefit of 20/20 hindsight. I don't agree with all his decisions, but it certainly makes for interesting reading and is packed with What If hardware ideas from start to finish. Regrettably the production budget for the book didn't stretch to artwork, but then that leaves you free to translate the prose descriptions into plastic or pixels with plenty of freedom.
There's a whole line of British Merkava-style tanks with the engine at the front, plus related APCs and support vehicles. In the air, the British advisor insists on a "Mosquito solution" to the bombing problem (he has a horror of the area-bombing that occured IRL) and gets them to produce a "Lancaster" wich is more like a giant Mossie with four engines and no guns. I suspect that cross-kitting a Lanc with a Canberra (and possiblr a Liberator for it's wings) might get you something close. At sea, how do RN carriers with armoured angled decks, unarmoured hangars, and side lifts strike you? My personal favorite, and one I might build some day, is the Merlin-powered hovercraft used on D-Day....