Wow, this post generated no discussion at all. I guess that makes sense since most everything is already set.
Seven of the 10 P5 CG slots are definitively clinched (both ACC, both B12, both SEC, B1G-W).
Ohio State would be #8 if they had played one more game and can clinch simply by playing this week.
That only leaves the PAC and there aren't really any fun hypotheticals there it is just Ore/UW playing for one slot and USC with the other unless they lose AND Colorado wins.