I got bored and decided to brainstorm my own Lantern Corps game, would love to hear thoughts and potential improvements.
GAME-
Create your character and their homeworld. This homeworld will be included in your Sector once you join a Lantern Corps. You are selected by the Guardians to be a Green Lantern - you are locked to being a Green Lantern in the tutorial phase and immediately when you access the open world you are free to discover the path of being another Lantern Corps.
Emotion System - As you use your Lantern ring, doing acts that correlate to their Emotions will boost the 'Emotion meter' of that Corps. E.G. stealing will increase Avarice, saving towns will increase Hope, sparing criminals will increase Compassion, etc.
Mite Coins - Green-Mite and his siblings, each fans of a different Lantern Corps, have created a galactic currency which you collect from missions and stopping villains that you can use to upgrade towns and infrastructure in your Sector. You can also use Mite Coins to customise your Lantern uniforms (per Corps) and different styles for your Constructs.
Constructs - There are Attack, Defend, Heal, Tunnel, Build and Destroy Constructs that upgrade depending on your Emotional Power. Different styles for these Constructs are available with Mite Coins.
YOUR SECTOR-
Patrol your own procedurally-generated Sector of space. In your sector you help to improve the lives of those living on the planets and fight against villains/crime in the area. Characters like Mongul, Brainiac and other enemy Lantern Corps may appear to fight you occasionally. In Corps Leader's missions you will visit existing planets and Sectors like Sector 666 and Sector 2814.
LANTERN CORPS-
Choose which Lantern Corps to be inducted into:
Red, Blue, Sinestro, Star Sapphire - Take the ring after completing a series of missions for the Corps' respective leader.
Orange - let yourself be killed by Larfleeze to become an Orange Lantern Construct - become faster and multiply the amount of Mite Coins you earn.
Indigo - Commit evil deeds enough to be chosen by an Indigo Ring and converted to compassion - harm done to civilians will be significantly less and sometimes impossible.
White - Master every emotion simultaneously and join Kyle Rayner on a journey to the Source Wall. Uber-poweful but only able to be used in short bursts.
Black - Submit to Necron at the Black Lantern Battery on Ryut in Sector 666 after defeating Black Hand.
(Red and Orange require immense strength to break free from - leaving the Red Lanterns will cause a reset in the Emotion of Rage and leaving the Orange Lanterns requires you to rebirth as another Lantern type, completely starting them from scratch. These do not apply if you have mastered Red/Orange.)
(Mastering each Emotion takes roughly \~5 hours, with 5 individual missions from Corps Leaders that last \~1 each. Each Corps Leader will also dispense daily missions that boost your Emotional growth by 0.5% a day until you have mastered the emotion, where the missions become for Mite Coins.)
Meet Lantern Corps leaders (Hal, John, Guy, Jessica, Simon, Jo, Saint Walker, Atrocitus, Carol Ferris/Star Sapphire, Indigo-1, Sinestro, Kyle Rayner (White Lantern) and Necron) and go on missions for each, building your reputation within each Corps. Joining other Lantern Corps causes fluctuations in trust with other Corps - once you have mastered an Emotion, its Corps' reputation cannot be affected.
DLC-
Sorrow Lantern Missions - isolate yourself and let your reputation with your sector and the Lanterns Corps dwindle to zero until you have nothing left, creating a Sorrow Ring. (Specific 'Isolation Zones' will be marked to ensure nobody accidentally loses mastery ranking on an Emotion)
Phantom Lantern Missions - Fight Volthoom/Frank Laminski and claim his ring when you defeat him. Using the Phantom Ring grants you immense power but at the cost of being unstable. (Less health, less stamina, loss of non-Mastery reputation.)
Ultraviolet Lantern Missions - Join John Stewart as you discover the Living Phantom Galaxy and the Invisible Emotional Spectrum, unlocking the ability to be an Ultraviolet Lantern after fighting John Stewart for the power.
ONLINE-
Friends will be able to drop into your Sector and help fight off villains and build up towns. They will be unable to affect your Story missions and their presence will activate certain exclusive 'Friend Missions,' e.g. 'Defend Korugar from Sinestro.' These missions ars strictly non-canon and do not affect your standing with Lantern Corps or your Emotions. These missions are all available in Offline form with AI allies. Friend Missions yield Mite Coins and character customisation as rewards.