The cover is wonderful--the first shinigami to show in the arc in a crouching pose. I guess Rukia's appearance in the manga really did spell the end for Ginjou and the fullbringer arc. I'm so eager for the poem. Will it be an answer to Ichigo's that opened the arc? Will it cover the idea that while Rukia didn't defeat Riruka with the sword, hers was a victory of the heart over Riruka? Rukia's defining moment in the volume was her speech about Ichigo and how he changed everyone--will the poem echo that?
Also, Jump Bang aired with a drawing from Kubo--Rukia playing guitar as one of the girls from Scandal! Cuuuuute! Screencap by melodymix and pic of Vol 54 below cut. (eta: Other souce credits Annie and Nacchan @deathberry and broken_coda on twitter).
eta: part of Kubo's interview from Jump Bang, translated by at the Rukia FC at BA HERE