I can't see socialists voting for a Republican. Sander's supporters are predominate young, the age group where Trump is weakest. Although someone with name recognition would certain be best, the DNC would be free to choose anyone. With the amount of money that has already been raised they wouldn't need to pick a name to attract contributions. Elizabeth Warren would be really good in the debates against Trump, however Democrats really wouldn't need her to get the women's vote against Trump. Lot's of interesting possibilities, however most likely Hillary will recovery next week and continue.
I didn't imply that the Socialists will vote for Trump. What I mean to say is that they won't vote at all.
These are some really pissed off people that believe they were robbed by the DNC. However many have settled for Hillary. Now if their candidate gets another chance and the DNC decides on somebody else besides the second place contender, they won't settle again no matter if it's Biden or anybody else. There won't be any excuses this time around.