The left is pissed. Their candidate lost and they feel they been sold out. The Democrat party failed to get the base out to vote. Warren is the only candidate that came close to Sanders progressive agenda. Regardless of her age, I'd like to see a market for her.
If Warren decides to run in the Democratic primary is in itself not newsworthy enough. Instead, there should be slate of candidates of who would win the primary, from Warren to Kaine to Booker to Klobuchar. Warren is probably the favorite now, but some things change.