Barak is a highly intelligent person. He has far more (self-acquired) historical knowledge that usual in Israel's leading circles. He has a social conscience. In short, he is no Netanyahu.
Not to be a Netanyahu is more than half of the requirements for a new Prime Minister. And if Barak is the sole credible candidate around, he is by definition the best one.
The Germans say "When he is hungry, the devil eats flies." Even people who dislike Barak intensely would welcome him as a savior from Netanyahu.
In Hebrew, Barak means "lightning" (unlike Barack in Arabic, which derives from "blessing"). Lightning is the split-second flash that illuminates the darkness. Did this split-second reveal a new Ehud Barak?
In short: is the Second Coming of Barak possible? My answer is yes.