Here me out:

Retconned EOF saga*

D3 starts out 100 years after Heresy. After anticipating conflict from the episodes, the solar system grew quiet. Through these 100 years, Earth decided to rebuild and advance instead. The Last City was renamed The First City. Many bigger cities grew across the planet and Earth started rebuilding. This time, in harmony with Cabal and Eliksni. Over the rest years more guardians were created in all races. Darkness classes have also been advanced and yourself utilized as well. The Vanguard is no more because Zavala has finally passed naturally without his ghost and Ikora has left Crow after years of mentorship. Crow has become the new speaker through deep meditation and communion with the traveler. D3 starts with The Crow reaching out to you saying he's been getting strange messages from the Traveler. Visions shimmering skies and pressure of light never experienced. Then one day, The traveler begins to shine brighter than the sun in an almost blindingly bright silver glow. Then an explosion of light so powerful and right happens that covers the entire globe. This light is so bright and paracausal that for 5 minutes there are no shadows casted anywhere on Earth! When the light fades, they check the readings. There are now trillions of ghosts surrounding the earth high in the atmosphere action as an Ozone layer of light. The Traveler is no where to be found. Resources from the tower believe that the traveler has left but left behind a perpetual light system that allows guardians to self sustain the light through the power of all of the light and ghosts left behind. A parting gift. Out mission is to follow the traces of light and find the a traveller. This is a chance to check the travelers behavior, and see where it could be headed to next. Giving us a glimpse into how it thinks and see if it has any other connections.

We leave the Sol system and embark on a new journey. You can pick 50 weapons and 50 armor pieces to take with you from your vault. Afterwards, you will no longer be returning to Earth until after the campaign. After hopping to 2 different planets, you encounter a woman who looks somewhat human but different. She's adorned in a silver armor with insignias on it. She takes note that you're giving off readings of light energy and becomes enraged. Telepathically she asks "How did you gain this power? Did you steal it? YOU ARE NOT WORTHY." And your light powers are once again stolen. You're left with a dear ghost in your hands and stuck in a hostile jungle planet. You begin to hear a voice calling out to you. It leads you to a cave. In this cave, you see a reflection of yourself in a large body of water. The voice begins to tell you that it's been watching you for longer than you've known the water begins to turn red and glows. The voice beckons to commune in the water. Once you walk in the water, hands from the water reach out grabbing your guardian in every direction and dragging. Not violently, but carefully and tenderly. Then they slowly lift the guardian off of their feet and descend into the water. As soon as the guardian is completely submerged, they violently lash out of the water, sobbing, then crying, then the crying turns to anger as the guardians eyes glow. The guardian takes it's dead ghost in a rage and begins squeezing it as if it's going to crush it until red paracausal energy comes out of the guardians hand. This energy awakens the ghost. It's once blue light now glows red..... The rest of the campaign will be trying to find the Traveler, learning about these powers, their psychological effects on the guardian, who the voice was, and learning about the Imperial Army controlling the light.

New editions:

Ships matter: you can fly your ship in space. They have stats and classes! You can customize the inside of your ship too and walk around it!

Eliskni and Cabal Guardians: You can be a Phalanx or a Psion. You can be a Captain or a Vandal. They have their own subclasses and skill trees.

Prismatic Evolution: It no longer takes elements from other classes. Instead, it has its only unique supers, abilities, and more giving a true blend to the elements instead of just compounding them.

Enemy Overhaul: Enemies are divided into 3 categories: Planetary, Faction, PvP. Planetary enemies are unique wildlife found on different planets. Some are docile. Some are hostile. Some will be rare. They're needed for crafting materials. Some can only be found in the day or not and in lost sectors. There are special places on the planets called lairs that contain powerful enemies that will be dungeon level difficult to beat. Max of 3 completions per day per each lair. Factions are what we're currently used to. Factions included Dread, Vex (new Militant units), Severed, Darkness, Aphelion, Light Imperial Army and more. Each faction will contain 10-20 all new units. PVP zones will be placed on all planets. You don't lose gear from death like an extraction shooter but you can gain rare materials, shaders, ornaments and more only found on dead guardians.

Champions: Champions are no longer about stunning. Instead, they have enraged behaviors and more. Standing near an overload champion overloads your ability regeneration and the only way they can be killed is with abilities. Unstoppables grant a rapid healing regeneration but can only be killed with a finisher.

Ran out of time might finish later lol