The next game ("Wargames of 1939") is nearing its completion! It is based on the engine of Populus Romanus, but has many additions and game-specific tweaks.
I posted an extensive set of screenshots to the game's own blog at ww2strategy.com ... take a look there if you like WW2 era wargames! I'm hoping to release the game some time in late August but don't take that as a definite promise. :-)