i was taking a look at mesoamerica before. it has a few unbalances that makes it kinda sucky for standard strategic settings, but might be tweakable into something interesting. not entirely convinced though.
we already did volcano island and ff vii at some point. they are both decent for strategic games so i guess we can repeat them if there are no better alternatives but i'd still like more suggestions.
ea&o with proper settings sounds interesting, i think gnuffone had done a fix on the settings at some point (we even put it on a poll for using on WGL but never did). so that sounds like a plausible alternative aswell.
timi´s template looks really interesting i would say, and using WR is something else then that we have seen in the templates during the last period
The map lionheart posted in his link might also be a nice map to look into but i don´t think the settings are really something that will be played in WGL since i think they will make for generally longer games