What i think is goign to happen~
Remember the area where you fight your rival?
After you beat your rival, all the blue polygons on the ground and all around you are gonna turn purple and rise up to start fusing together making polygon man!
Then once you beat him he will shatter like glass and everyone lives happily ever after... It was all clear to me once the glass sounds came up.
I'm pretty sure that this battle takes place in the weird blue polygonal plain shown in the Rival Video and all the marketing pictures. I'm hoping that the boss stage itself is a mashup of this place and the start up screens from the various playstation consoles. Like the pillars rising up through the stage like in PS2, with the green and red lights. The swirly XMB default background etc etc.
They don't sound all that similar though - that's not my main gripe though, I just don't see a mash up stage character being the boss, it just doesn't make sense. I'm just waiting for the Paris stage's VO to get uploaded so I can compare Negativitrons voice from that with this.
im not saying that he is the final boss. but the voice that rumba uploaded is Negativatron.
EDIT: of course they are not gonna sound the exact same because SB didnt recycles old sound bytes for the game.