Sounds like Kerry for Biden’s VP?
I doubt that a past candidate for the Presidency has returned as the VP nominee, and furthermore doubt that Biden would go for it (it would be signing his own death warrant if, by some remote probability, they won). Biden will pick Buttigieg for his running mate, partly because he thinks he doesn't need help with voters of color, and partly because he needs to make sure the flamers don't desert the ticket. Oh, and because he's a tone deaf moron.
Biden has already said he wants Michelle Obama for his running mate, but she has zero respect for him, so Kerry is a possibility.
I think Trump supporters should prefer Clueless Joe to Bernie. Clueless Joe as the front-runner will be more likely to prevent Bloomberg or Hillary from getting the nomination. Both are beatable, but more dangerous than a crazy socialist like Bernie or a confused old man like Biden.