The contents could be the following:
- All of the DLC released thus far.
- Bring back espionage.
- Bring back random events.
- A more developed medieval\renaissance era (let's face it, 1 turn you're using knights, 10 turns later you're on lancers, 10 turns later you're on cavalry. The era hardly exists at all. You end up using tanks\etc for 150+ turns as opposed to 30 of the medieval era.)
- New technologies.
- HEAVILY IMPROVED MULTIPLAYER <- WHY IS MP STILL UNPLAYABLE ALMOST A YEAR AFTER THE GAME CAME OUT?
- Improved AI.
- More Civs.
- Improvements to bad Civs like England.
- New victory type.
- More in depth barbarian empires.
- New type of city state.
- New city state missions.