Well firstly, might not do a campaign in Attila due to a lot of shortcomings of the modding tools, particularly being unable to make a Middle Earth campaign map. Our options are pretty much stick with Attila and the shortcomings, hope the next Total War game has much better modding tools, or make the campaign on Mount and Blade Bannerlord.
If we did though, there will probably be custom settlements such as Constantinople being replaced with Minas Tirith. In addition we'll change the campaign map icon thingy. Check this to see what I mean http://www.twcenter.net/forums/showt...-s-Work-Thread
We haven't tried doing either of these things yet and I don't think anyone on the team knows how, so we'll have to ask the people who do know. Anyways, we'll have to use the positions of the vanilla settlements since we can't change that.