As of Tuesday night PST, only the big belts are at risk, come Sunday. This absolutely has to change–and I think it will on this week's Smackdown. While it would be just as easy to make a US or tag team title match, I think Wade Barrett defending his IC belt makes the most sense.
In case you didn't follow the supplemental draft, Sheamus was drafted to Smackdown. This means both the IC and US Championships are on the Blue Brand. Now I don't know what WWE is up to, but some balance needs to be restored quickly. Assuming no IC or US title matches on Sunday (which I don't think will happen) that means there will either be the WWE and WHC Championships on Raw, with the US and IC Championships on Smackdown, OR the WWE Championship on Raw, and the other 3 belts on SD. Either way, the balance is off.
Sheamus needs to have a good title reign to add strength to a character that has been booked extremely weak until a month ago–so that just leaves us with Barrett, who can lose the title and still have credibility.
Teddy Long trades the Corre for the New Nexus on Smackdown, Christian wins the WHC, thereby keeping a championship balance.
Ezekiel Jackson challenges Barrett for the belt, and whoever wins, jumps ship to Raw.
Sheamus and Barrett go at it for a new belt that is the jewel of Smackdown, Cruiserweight belt is added.
WWE is in a pickle right now and it will be interesting to see how they resolve this situation.