Important characters who just disappeared from movies without any conclusion

Are there any characters who seemed important to the plot of the movie or just the other characters in the movie who just kinda disappeared from the movie without anyone saying anything?A minor example but there's Finnick, the small fox with the deep voice who pretended to be a baby in Zootopia.I say minor because he had no effect on the plot of the movie but I find it kinda weird how the movie showed him and Nick were regular con partners, pulling cons together almost every day yet, once Nick becomes a cop, the movie doesn't bother explaining what happened to Finnick. The last time we see him, he's giving directions and...that's it. You'd think Nick giving up con artistry would have an effect on his life and you'd think they'd want to show that but I guess not. Even the end having them stop over Finnick instead of Flash and him going "Oh god, is this why I haven't you see the last week or so?" would've been fine.It's even kind've funny because one of the directors responded to the Honest Trailers video for that movie by saying "Ha, that's funny but you forgot to list these characters" and one of them was Finnick, which couldn't help but make me think, umm, you also forgot Finnick, I don't think you're really one to talk about that. via /r/movies http://bit.ly/2Sj4mC9