if you notice when hiro first enters the house, there is a picture of a man standing over a dead man in suit lying in a puddle of blood. at first i thought i was a throwback to season 1 with sylar and issac..but issac wasn't wearing a suit.
could this be foreshadowing the demise of someone? or perhaps this painting is from IABD when Peter cut open nathan's dome? only cats in a suit that i know of ar e Nathan and Arthur.