Here is a roundup of what was said in the QA chat by the developers. I split them into different categories. Game types, Classes,weapons,maps,new in game features and Miscellaneous.

Game types:

• King of the hill
• Team Death match and Capture the Flag could appear on other maps.
• Game type revolving around gate dialling.
• Free for all game type being considered.

Classes:

• More purchasable content.
• More unlock able content.
• More customization abilities for classes coming
• More in depth customization for characters coming to help individualize players.
• High resolution models being developed for the remaining 4 classes.
• Male and Female versions of each class in development.
• No real yes/no on SGC classes getting a melee attack.

Weapons:

• Zat Gun damage ability released: “This new damage doesn’t take away your health but if that damage accumulates too much you will die or even dissolve”.
• Zat damage will diminish over time.
• Scientist Turret balance being looked into.
• Zat release date between now and Christmas.
• More human and alien style weapons in development
• A turret takeover weapon is in development.
• New weapons will a mixture of SG cannon and unique SGR weapons.

Maps:

• New maps in development.
• Map seen in the recent wallpapers is a tease for the theme of the new map (looks like the next map will be ship based).
• Stationary turrets and cannon placements may appear in future maps.
• Destructible objects are planned to open up new passageways in maps.
• New Easter Eggs will be in future maps.
• Current worlds could see more than one map.
• Vehicles could be seen in vehicle based maps in the future.

New in game Features:

• The ability to dial the gate is being developed.
• Clan match support being considered.
• More factions are being planned.
• Report abuse system being implemented into SGR. Works by writing short description of an incident and submitting it to DCG ingame.
• New classes are being discussed.
• Friends system being added to the lobby.
• Tutorial system being added to help new players in SGR.
• DCGs vision for the next 6 months: More characters customization, more maps, more map types, less bugs and more eye candy.
• There are plans to redesign the Heads up display (HUD) and User Interface (UI).
• Mini map is being considered (not likely to be seen until a UI redesign).
• No plans for an ingame database.
• No single player mode for SGR.
• Server management tools are in the development.
• No plans for ingame voice communication.
• Lobby chat will be added in the future.
• Iconic SG characters could appear in SGR in the form of a Hero class, over the radio or just as references like General Carter.
• Clan servers are being worked on.

Miscellaneous:

• No plans for a SGR map editor.
• Alternative language support being developed.
• Next Patch will see bug fixes and polishing of the game.
• Stargate Resistance merchandise being designed.
• European Servers are still high priority.
• RPG elements to be added to SGR: Active and passive abilities and unlockables.
• SGR advertisement could appear on SyFy and MGM (likely meaning in DVDs), advertisement will likely appear in other ways beyond TV.
• Another Free Play event is being considered.
• SGR in game music will be downloadable of the SGR website in the future (unknown if it will be free or have a fee).
• A boxed version of SGR is being considered. Could be seen as early as November.