Well, there is nothing about Bell that screams "Rival!". But she did battle Ash (and lost) and she does Gyms. So... Maybe she'll be recurring.
Also, she mentioned her father. I'd love to see him in the anime sometime too. The scene between Bell and her father was inarguably one of BW's highlights.
Also, I love that the Badge Case looks like the one in the games. Showcasing game stuff = good. Hope that BW does a better job in adapting the games than its predecessors.
After 12 years of being a Pokemon fan, I'm officially quitting the fandom. This is not a rage quit and it has nothing to do with the Pokemon franchise. It's also NOT a sudden decision - I've planned it for months but I decided to stay a true, active Pokemon fan until the very last day. The reason for my leave is the fact that I'm starting my studies at the Uni and I decided that it's a perfect moment to move on with my life. I'll never forget all these awesome years and Pokemon will always be a part of my childhood memories. Goodbye friends! Thank you.