Basically what I hope happens after part one of the finale (of the 100). I love the idea of Clarke and Lexa so they're going to be endgame in this. This is basically just to take the sting off of Lexa's betrayal. Whoops, spoiler! There will be more of those in here.
Clarke and Lexa's story continues as they battle new enemies and fight to maintain the alliance.
Peace through political marriage. Will the marriage last when one has already given her heart away? (A bit of Bellarke at first but trust me, it gets better)