Posted primarily so M6P and I stop derailing certain other threads
A quick refresher on the franchise:
For my part, I came into the franchise at Rome and have been pretty dedicated ever since--even in spite of horribly buggy and poorly optimized releases like Empire.
Vanilla RTW is fun, but I don't think the game really comes into its own unless you run the SPQR mod. Loved BI. Loved Medieval II and Kingdoms, too.
I'm getting a bit tired of sequels/modernizing of older TW titles though. I think the franchise lends itself pretty well to a number of ideas that could make for good new titles. It'd could be pretty cool to see dynastic wars of ancient China, the American Civil War, ancient Greece/city-states, etc etc. They could even license Tolkien and do Middle Earth.
I know some of these have been done via modding, but I can be hopeful for an official product