Does anyone else find it odd how much the Rumba pirates resemble the Phoenix crew from the anime filler? Sick captain, whittled down crew, derelict ship…
Also, this chapter shows that Yorki's crew was taken down by hand to hand combat, and not merely at range by cannon fire as had been suggested by the anime. The kid in the polka dot shirt had a sword stuck in his skull... so we can assume Brooke died in One on One combat and we may yet meet an old timer who was guilty of that massacre.
One other note is that the ship Brooke was stranded on at the start of the arc is NOT his old crew's ship. It lacks the cow skull head piece and has different patterns on the sails. Brooke likely was stranded on that ship by the Thriller Bark crew after his zombie killing rampage through TB. Considering the other people who had their shadows stolen at the same time as Brooke, that ship could have belonged to the striped shirt guy who got fried, the weird dancer, or any number of crews.
This makes it more likely that Lola and friends will take off with that ship after Franky fixes it up for them. I doubt they'd want a ship with a mausoleum in the hold.