1 Year - After coming to terms with things with Valerie, Lotte's going to run off with Diego to South America for a little while. While submitting apps to music schools. After some proper training - and moving outside of her usual boundaries - she'll begin performing. Bit roles. Off-off-Broadway.
5 Years - Moving on up. Side roles. I have this insane image of her ending up in Phantom of the Opera as Meg and she grimaces the entire time and yells at people. Not going to happen. She'd be a name followed and one of those people everyone goes "Oh she can't be that nice as she seems in the interviews, she must secretly be a bitch." She'd be succesful enough to stand on her own two feet, socially and so on. Maybe even attempt dating again.
10 Years - Settled into her fame. More than likely married. NO children. IDK? I think she might be happy at this point.
I'm also ridiculously hopeful for her :/
Luther:
1 Year - Sticking in Joanie range! Gonna have made contact with Maddie, his exgirlfriend. Awkwardtimes. Get a regular job in the law force somewhere. Wherever Joanie is.
5 Years - Married, actually. Probably with a kid (though if it's his as much as a step is debatable) Still working on the law. Still checking in on Joanie kins daily.
10 Years - Either retired or dead on the force >_< He'd be forty-eight, geeze.
Joss:
1 Year - Having finished up her college degree, she'll probably stick around Sherri if she lets her. Do more drawing. Still settling in with herself.
5 Years - After her painting 'Sucktastic" is discovered, she gains some fame in the artistic world. Picks up some old partying habits. Shacks up with a few people. Eventually meets someone who could have been Aladdin and they go to Vegas.
10 Years - Joss and said guy have an on-again, off-again relationship. Joss probably has kids at this point. She's also a terrible mother, though she encourages lots of acts of rebellion.