Maps?

What maps should TF:N have? An obvious emphasis on urban maps (especially American ones) would be good, such as New York, Chicago, LA, DC, or even as far as London, if we want to do international maps.

Cybertronian cities, such as Iacon and Kaon, are also interesting to have and could spice up the gameplay a bit.

I don't really know, I just believe maps are a vital part of gameplay, so some new ideas would be appreciated!