I don't think they will sub in Hillary Clinton instead of Biden and I don't think she'd win against Trump.
But fuck it would be kind of funny wouldn't?
Like Hillary gets in 8 years and 2 presidents later. The supreme court is packed with conservatives, the reactionary response is insane (like Obama teaparty turned to 11), the carefully cultivated imperial project is on decline, and she's just doing a really lacklustre job that libs have to insist is historic.
But like she is somehow worse than Biden AND because she's the first woman president you're a sexist for not supporting her death squads in whatever additional conflict she has started.