Elsa Keslassy International Correspondent In a comeback worthy of “Succession”‘s patriarch Logan Roy, French billionaire Vincent Bolloré has re-emerged from a fictive retirement to engineer a strategic overhaul of his listed media empire, Vivendi. After seemingly passing on the reins of Vivendi to his sons Yannick and Cyrille last year, Bolloré stepped back in with a plan to split the French conglomerate into three businesses – pay TV group Canal+, advertising banner Havas and an investment vehicle comprising Lagardere Group — that would each be listed separately at the Paris stock exchange.