Here's how returning home and Princess Celestia's surprise goes in Revenge of the Red Diesel.
[a shuttle arrives at Canterlot castle, where Brian, Chris, and Barret are greeted by the rest of our heroes]
Princess Celestia: Are you alright? Me and Sharon were so worried about you...
Barret Barricade: Don't worry, I'm okay.
Princess Celestia: But I'm glad you're back.
Brian: But our troubles aren't over yet, there's new droid commnader named General Skull. And he escaped before he could apprehand him.
Chris: But with the death of Nightmare Moon, and King Sombra, the war will soon come to an end.
Princess Celestia: Even so, we can't let that General Skull guy escape so easy. Besides, I have some important news for everyone in the council.
Twilight: You'll find out.
[soon everyone is gathered in the main council room]
Princess Celestia: Everyone. I am pregnant!
[everyone gasps in surprise]
Bartret Barricade: Celly, you have another foal?
Princess Celestia: Yes! I do! I had a test did today and it came out positive! We're having another foal!
Brian: Your highness, that's incredible!
Chris: It's amazing!
Pinkie: You know what it calls for? A party!
[soon, everyone is having a celebration over Celestia's new foal as Sharon comes in]
Sharon: I'm gonna have a sister?
Princess Celestia: Yes, you will. You're gonna be a big sister soon.
Sharon: That's great! What do you plan on naming her?
Princess Celestia: Your Father and I will figure it out as we go.
[It then sideswipes to the next scene where Chris arrives at a door and knocks on it, and Sunset Shimmer walks up]
Chris: I'm home, Sunny.
Sunset Shimmer: Chris! [hugs him as Chris hugs her back]