Here's how Brian's departure and Chris and Sunset talk again in Revenge of the Red Diesel.
[we sideswipe back to Canterlot]
Chris: You're gonna need my assist for this Brian.
Brian: I agree, but it may turn out to be a wild goose chase.
Chris: Say Brian? I've disappointed you. I haven't been very appreciative of your training. I've been arrogant, and I apologize for it. I've just been so frustrated with the council.
Brian: You are strong and wise, Chris. And I'm proud of you, and soon You'll be a great Jedi. But be patience, Chris., It won;t be long before you're granted rank of Master. [he then starts to leave]
Chris: Brian, May the Force Be With You.
Brian: You too.
[Brian then steps down a fleet of stars and boards a cruiser, as it takes off]
Clone Equine Commander: You'll have to make it to the Jabba the Hutt's palace to tell Rota the hutt where Skull is.
Brian: Right. I'll keep him distracted, just don't take too long to get down there.
Clone Equine Commander: Come on, when have I ever let you down?
Brian: Alright. Well the burden is on me not to destroy all droids until you land. [he then hops into his Starfighter]
[Brian's starfighter then flies out of the crusier and into the hyperspace ring, and jumps in]
[we then see another promition dream where Brian and Celestia are there]
Brian (dream): You're doing okay. Don't give up.
Princess Celestia: (dream) [moans in deep pain]
Brian: (dream) Save your energy.
[It goes into the present]
[we see Chris sitting on the couch as Sunset then walks in]
Chris: Brian was here, wasn't he?
Sunset: Yeah, he came by this morning.
Chris: What did he want?
Sunset: He was just worried for you. He told me you were really stressed.
Chris: [sighs deeply] I feel lost.
Sunset: Lost? What are you talking about?
Chris: Brian and the council don't trust me.
Sunset: They trust you with their lives.
Chris: Yeah, but something's happening. I'm not the Jedi I should be. I want more, and I know I shouldn't.
Sunset: You're expecting too much of yourself.
Chris: I think I may of found a way to prect Princess Celestia.
Chris: I'm finding out more details about it as I go.
Sunset: Is that what was bothering you?
Sunset: Chris, don't lie to me. Princess Celestia' not gonna die in child birth. I assure you.
Chris: Yes, she won't die, I'll make sure of it.