Now that I've unveiled that, I can explain more in details what they will contain:
1) for sure:
-2nd UUs
-2 more units
-many changes to the units stats
-several changes to the tech tree
maybe:
-religions
-some new leaderheads
-some new wonders
-some new governments
2)As there's a great request, I may get rid of "Sumeria" version and once for all, do an alternative version with the civs you want in.
You can discuss here, or I can post a poll and let you choose.
Possibly in: Sumeria, Sioux, Australia, Khmer, Poland, Hittites, Celts.
Possibly out: Israel, Ethiopia, America, Byzantines, Austria, Korea, Netherlands, Maya.
I want to point out that this would be a stand-alone pack based on the basic mod, leading to a dead end. The development will continue with the Xpack.
3)16 civs in the 134x130 map. A boring thing to do, but sooner or later it has to be done.
4)There are 2 possible choices about the map: cutting the 134x130 or making a 100x100, as there are max 8 players.
And another doubt: free choice for the civs, or divided in 4 groups
5)It would be nice to preplace cities coherent with some dates. For example before 1700, or 1776, or 1789, or 1815. But I don't promise anything. I'm not sure of doing it and when.