Well, assuming that your project will need some information on Civ V, then what information we can deduce and collect is posted in a couple places, I would recommend this site though,
Arioch's Vast Well Of Knowledge
As for me personally what am I looking forward too,
- Greater Tactical Combat, with 1 Unit Per Tile limits, as well as the addition of Ranged Combat mechanics, and improved Naval importance with the ability to use the Ranged mechanic to fire on land, as well as improved positioning importance, e.g with flatland giving a -33% defensive penatly and rough land (hills/forests) giving +25% defensive bonus, and I could probably go on and on about more things that improve Tactical Combat, suffice to say, it will be much more fun this time around, and also harder and more complicated (Civ5 simplified? Bah!) than Stack Combat ever was.
- Lush and Organic Graphics, Yes this while not important from a gameplay prospective, If I am going to spend 200+ hours playing this game, I do want to be amazed at the graphics, and Civ5 has not fallen short on my expectations to make its lastest itterations more beautiful than ever.
- Hexes, not to say I have ever given it much thought before Civ5 was announced, but Hexes do seem to, Improve Visuals & Improve Gameplay, so they will be a welcome addition.
- Social Policies, I was very bored with Civic's like in Civ4, so I'm glad they decided to innovate this aspect, now we can mix&match bonuses from various different Social policies all at the same time, its not an original concept by any means, you can see similar "Bonuses" in many games, for instance World Of Warcraft has bonuses you can mix and match to make your character specific, likewise, Civ5 for the first time is using this in its Social Policies and they will dramatically change your game, leaving lots of variation in how you try to win the game.
- Leaders / Civilisations, I am also loving the new Unique Abilities, such as Englands "+2 to naval movement" or Romes "+25% to production on any building already built in the capital", these will really help (along with the Unique Units & Buildings" to variate gameplay and allow for massive replayability, something Civ is famous for.
- City-States, A new and fresh introduction into Civ5, they will really come into play, giving out huge bonsues to allies, and perhaps asking you to declare war on someone else, not to mention their obvious importance for diplomatic victory, something I never usually bother going for, But I may do now thanks to their introduction. My main Civ Rivals I never try to hard to keep happy, I would rather they DIE ON THE END OF MY SWORD!, but these city states aren't trying to win, I don't mind living in peacefull bliss with them

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- Win Conditions, Although I will still be looking forward to warfare a lot!, I might also try for other types of victory Cultural or Diplomatic, or Scientific, it seems you can achieve them even if you also are a warmongeror, this is thanks to a great symbiotic realtionship I think with all the victory conditions, I.e to win at conquest, this can't be your only goal, you also have to have culture to gain militaristic social policies (or economic) to fuel your military and devestate your enemies, you will need science to research new militaristic goals to make better units and destroy your rivals, you will need some element of diplomacy, City states can be good allies in warfare, some even give you Unique Units, also you can't simply be at war with everyone and win very easily, as for one you will be up against too many units at the same time, and two, allies can trade and make research pacts, all of this helps in economic gains needed to support larger empires.
- And much more, their is a lot of innovation in Civ5, and really I can't wait to get my hands on the game and play it till I burst. A lot of ineffective Mechanics have been removed and brand new ones are in thier place, and I am looking forward to getting to know each and every one.
Glad to see your working on some super secret Civ5 project, Good luck with that,

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