User blog comment:Xilinoc/Ch. 647 - THE THEATRE SUICIDE/@comment-27082083-20151016002357/@comment-11051098-20151017035402

Ukitake absorbing and returning Lille's Heilig Pfeil is a possible scenario, I'd say, if he's still alive and able to get to the Royal Realm on his own, cos I assume the gate closed after the Shinigami + Bazz, Liltotto and Giselle came through.

Just like with Baraggan's Respira, Kubo could pull the same thing with Lille's Heilig Pfeil, making Lille so strong he can withstand even powerful Kido spells, but ultimately getting killed by his own power. It would be a repeat of something we saw before, but possible if Shunsui's Bankai turns out unable to kill him.