It would be more correct to say that Giant Space Hamsters have been made into something "real" after Minsc seeded the idea in BG1.
So, ret-con.
Lol. Yeah. I know. I read something about how Gith buy and sell them as a delicacy too. Really? It was funny because it was so unbelievable. Make it a real thing and it's no longer funny.
Well, to me anyway. I was always like, "You're a good guy, Minsc - a bit crazy because you suffered a head injury - but you're a good guy. Boo's a normal hamster. He doesn't fight. Ever. He just travels with you, but okay. Crazy Minsc.". Then I'd smile, recite his quotes because they're funny, and enjoy having him around.
It's just weird to me that he's alive a hundred years later. It totally destroys his character to me. I wish they'd just let him live a good, heroic life and be happy and have him have lived and died with a good, happy ending.
The only cameo that really makes sense is Jaheira as maybe a Harper leader. Have her pop up as someone you can meet leading Harpers by guiding them outside of combat. They won't let her fight because she's old. She may not look it, but she's well along in years and unable to fight like she used to.
Or maybe elves like Viconia. She'd have made for a good cameo in Grymforge or somewhere like that, trying to uncover ancient Sharran relics.