I'm not sure if Betsy will have make any defining actions or choices; however, I feel like she may have a "Colossus" role in Disassembled. This means that she's appears in every issue and is involved in the adventure, but she doesn't make any large decisions or actions (someone you'd see from Jean or Hank). However, I wouldn't consider it exactly wallpaper. But hey! I may be wrong and Betsy's role could be a game changer like it was in Remender's UXF.
Also, it looks like the artist based Betsy off of Cara Delevingne there.