I know that MZ is the last DLC, but is my idea good?
Here is my idea:

You are walking until you stumble across some Super Mutants who are fighting some Wastelanders at an airport. Quest begins: Lost Plane. You help the Wastelanders and kill the Super Mutants. You walk up to a surviving woman named Jennifer Mech Filch. She thanks you for saving them and you ask why they are at the airport. She tells you that they found a working plane that was taking off while the bombs fell. However, some vital parts have been destroyed. She needs you to find some pieces scattered across the Capital Wasteland. Find the pieces and return them to her that she can make makeshift parts. There are 15 parts in all, and some are relatively large and some are small. After finding and returning some parts, quest ends. Quest begins: Does this look infected to you?. As you are working the plane with Jennifer, a pressure tank explodes and spews radioactive liquid. Your body slowly mutates. Jen insists on you coming with her to get the mutation treated. You have no choice but to come with her. She asks you if you are ready, and you can say Ok or that your not ready. However, the more time you spend unready, the more Rads you get. You will get 5 rads every 10 seconds. When you are ready, you get in the plane and ask where your going. She says, Massachusetts, because its the only place where no bombs fell and there are no rads over there. The screen slowly fades to white. You wake up in Boston. Everything looks Pre-war and clean. You step out and she tells you to find info on where Dr. Penn is. You need to go about the area, asking people about Dr. Penn’s location and searching for notes. After 3 speech successes or 5 notes, you find his location. Return to Jen and notify her of his location. She leads you to his hospital and talks to the doctor. She explains what happened. The doctor said he can cure you, however it cannot remove the mutations that you already have. He tells you to lie down and everything fades to white. You wake up and Dr. Penn explains that the surgery was a success. Perk recieved: Living Mutant (Description): You have minor mutations and will have 10% increased Rad Resistance and 15% more damage when fighting a mutated species (All kinds of Super Mutants, Trogs, Ghouls, All kinds of Radscorpions, Radroaches and Yao Guai). Jen rushes in and yells that the Enclave have arrived and that they need more help. Quest begins: Enclave: The Voice of America. You rush out and a lot of Enclave soldiers are attacking the area. You fend them off for about 20 minutes. The Enclave send in one last wave of enemies, and you clear them out in about 5 minutes. When the enemies are killed, the Enclave retreats. You did it! Dr. Penn and Jen rush out to thank you. She hands you a weapon called Microwave Rifle as a token of thanks. The Microwave Rifle has 40 DMG points and will make enemies heads explode. There is a unique varient of this weapon called Toaster Oven and does 5 more damage. You can now return home with Jen in the plane and you can return whenever you like.

New Armors:
Kamikaze Enclave Power Armor
Ben Franklin’s Outfit
Mercenary Power Armor
Clean Pre-war Suit

New Enemies:
Enclave Kamikaze Soldier
Insane Bostonian

New Weapons:
Microwave Rifle
Toaster Oven (Microwave Rifle unique varient)
Gatling PlasmaGoo Pile (Gatling Plasma unique varient)
Combat PistolLead (Combat Pistol unique varient)
Ben Franklin’s Rifle (Lever-action Rifle)

New Perks:
Living Mutant
Bostonian Accent (+5 Charisma, +5 Barter)
Doctor (+5 Science, +10 Medicine)
Pre-War (You dont recieve Rads when wearing Pre-War clothes)

And thats it!