As an idea you could post a tentative phase plan for development in outline form.
Example:
V19
Phase 1 - focus on Prehistoric Era
Maps 99%
Units 92%
finish Subdued Animals in C2C discussions - to be worked on.
Unit Promotions
civics
terrains - add new terrains -x person
Dancing Hoskuld:
ship wrecks
malaria and possibly smallpox
more documentation. Possibly a how to add extras for users. Movies and optional terrain to start with.
subdue new animals, new subdue mechanic for sea critters.
more specialists in city screen
Overflow
sort option buttons for buildings etc in city screen
alt-timeline improvements
Orion Veteran's Immigration mod - reintroduce
Fix various bugs.
Phase II - WWI and WWII additions
wolfhanze mod units
units mentioned by Mega Nix in the Integrating Mods thread
http://forums.civfanatics.com/showthread.php?t=439576
http://maxriga.civfanatics.ru/Units.htm
Phase III - Transhuman era expansions
alternative timelines
science fiction technologies
integrate other future mods
Phase IV- - Galactic era
add aliens and alien technology from other mods.
alien invasion era.
...and assign names and progressions to different sections
like thread#3 in world history mod
http://forums.civfanatics.com/showthread.php?t=262780
lays out basic plan and percentage completions.
This could also be good to attract people who have certain skills.
ex) looking for people to complete 3d models of buildings or animals.
and you could have a loose progression plan, based on what you want to tackle.
I also recommend threads for collecting ideas along these lines, so good ideas aren't lost or forgotten in threads. You can revisit them when you are ready to tackle ideas at your own pace.
It might open up discussion on areas that you want to develop later, and to start working out ideas for them, while you focus on what you all want to work on now.
Also each of you guys could have your own thread for proposed development so you can keep loose pieces and eventual ideas in one place. If two of you guys are thinking on working on the same thing it would help you both anticipate it.
What do you think?