A Biden/ORourke ticket has been mentioned. Also, a woman on the ticket could be a good plan but which one?
No, it would be a dumb plan.
What is with this idea of putting people up there on the basis of their identity group? And if you're going to do it at least do it in a way which benefits you.
A woman would excite mostly one segment of the population - college educated women. And they are already heavily incentivized to vote Democrat. If you want to win the damn thing you want to select someone who will appeal to groups who are not already firmly in your corner.