(DISCLAIMER: Please note that there are multiple changes to plot of the beautiful series that is Rick and Morty anyway let's start)
Morty: It's been a year since the destruction of the Citadel... and since you're here, I might as well tell you what happened.
Back in 2021, Evil Morty arrived at the Citadel and attacked it and the remaining survivors of Earth. Luckily for some, they were evacuated into other dimensions, which hopefully they'll be safe from Evil Morty. This is where my turn to be Evacuated came...
Soundtrack #1: 0:00 to 1:20
Rick: ...I'm sending you to the one Dimension that is quite similar to ours, Morty, remember it?
Morty: Yeah, b-but what about you?
Rick: I'm going to buy you time to escape.
Morty: No! I won't leave you-
Rick shoves Morty back into the escape pod.
Rick: No Morty, I'm doing this for you, for you to stay safe. I'm sorry. But you can't always make a change... or make a difference... or make a whatever.
Rick: All that will matter is for you to be safe.
Evil Morty: There you are.
Rick closes Morty's escape pod and sets the launch timer for 20 seconds.
Soundtrack #2: 1:25 (as Rick is impaled)
https://youtu.be/RLBFv2Ayxbs
Evil Morty: Now perish.
Rick and Evil Morty start Fighting eachother before Evil Morty impales Rick with a steel bar.
Rick: AHRGH!
Evil Morty: I knew I was right, your greatest fear I mean.
Rick: ...
Evil Morty: You fear being outsmarted, and most importantly... People being SMARTER than you.
Rick: What was that for? A couple of bucks-
E. Morty kicks Rick before ripping the sharp Steel Bar from his torso and readies the aim for his head.
Evil Morty: So, Any Last Words?
Rick, coughing up blood: Yeah. Boom.
Morty's escape pod is launched away and shows a screen for Morty to see the last moments of everyone in the Citadel, including Rick, who pulls out a remote and presses a button which activates the Citadel's self destruct.
Citadel System: Self Destruct initiated. T-minus 10 seconds.
Evil Morty: YOU FUCKING PIECE OF-
Rick kicks E. Morty away and stabs his leg with the steel bar and walks to the window as the countdown hits 5.
Rick: Goodbye.... Morty...
Citadel System: 5... 4... 3...
The screen in Morty's pod turns off as he looks at Rick waving goodbye to him from the window as the ship starts lighting up.
Morty: R-Rick?
Soundtrack #3: 1:25 (as ship explodes)
https://youtu.be/RLBFv2Ayxbs
The ship finally explodes, blowing up in blue, green, and purple colors. Morty bangs on the window with his fists and yells:
Morty: RIIIIIIIICCCKKKKK!!!!!!!!
:as a portal to the Dimension mentioned opens behind his pod just as the shockwave of the blast reaches him.
Soundtrack #4:
Morty: ...And that was it. *Morty sheds a tear and sniffs from remembering it* he was just.. gone. I'll miss Rick, but I believe he left a note for me, here's what it says.
Soundtrack #5:
Morty then finds the gadget in one of the drawers in the room he was in and fires it, opening a Blue and Green portal. Morty, after staring at it for a while, enters it, only to be surprised by what's in it.
Morty wonders what to do next.
To Be Continued...