When Isaac is putting the painting of the suicide bombing on a table, there's a draft of some other painting or artwork of some sorts already on it.
take a look at a hi-res picture
A bald man with a sun symbol (or eclipse?) on his forehead.
You think that is supposed to be Sylar?
In front of the painting with the bus, when Isaac gets it, there is yet another painting I didn't notice all this time before. It's the one you see the left part of on the right side of the picture I linked to up there.
I can't tell what it is. Could be a head or could be any object that looks like a head. No idea.
here it is, on the right side





