What if Eleanor of Aquitaine marries Eustace of Boulougne instead of Henry of Anjou, what will happen to England, will that give him edge against the OTL Henry II.
You'd need plausible reasons for Eustace to still be single and for Eleanor to pick him over Henry, Henry's brothers or Eustace's uncles. With his own inheritance shaky I'm not at all confident he'd be able to challenge Louis and enforce his rule in Aquitaine.