If Jacob had appeared before Bella an Edward get married she would left Edward at the Altar and would go with Jacob?

no!!!! she had made her decision in eclipse! she had also promised never hurt edward again...

Why are people still asking these questions? Edward was her soulmate...She was never "in love" with Jacob...yes she loved him but thats not the same. :)

NOOOOOOOOOOOOOOO!SHE WOULD NOT SHE MADE UP HER MIND.