Oh man this chapter clicked so many things for me. That hollow form is definately not a coincidence, and it's great to see Ryuuken and his family.
So i guess it's pretty obvious that Ishida's grandfather didn't die because of late assistance? Clearly a pimped-out hollow sent by Aizen did him in. It's making a pattern: Shiba Kaein, Hirako and his gang, Shiba Isshin now, then later Ishida's gramps.