I don't think it'll be a priority because I'm not really sure if this is a real thing that Warren believes or if she's just throwing this out there to see if it has legs.
If someone other than Warren gets elected, it could very well get put on the back burner. But this is defintely what Warren believes. When she was a professor at Harvard or the head of the CFPB, cracking down on very large, very powerful corporations was always her focus, whether via anti-trust or other means.