Still want Wade vs Sheamus feud
Look, since Del Rio is WHC, and is obviously a face, there is no reason for me to think that Sheamus will be looking for a WHC shot. I just can't imagine the WWE getting creative, and having a face vs face WHC match. Barrett vs Sheamus is something that I feel would work very well with both stars. The best part is leaving the IC title out of the picture. Wade would claim that there is no way there is any Irish man alive worthy of competing for any title around his waist. Have the two going at it on with twitter 24/7.
Barrett would air vignettes about how awful of a country Ireland is during Sheamus' matches. I'm certain they could come up with various things to say about the Irish culture that jokes amongst the English. I'm not from either country, but it doesn't take a rocket scientists to figure this out. Although there is no legit country beef between Sheamus, and Barrett this seems like the most realistic option towards a feud. Perhaps Wade pulls a card on Sheamus being HHH's work out buddy, and the fact that Vince would never allow an Englishmen a chance at either the WHC, or WWE title because of his bias against the English.
Have the heat between these transcend the ring. Show "staged" brawls between the two men in various areas of public consumption, or being. Perhaps pubs, night clubs, and parking lots. Anything to show how much these two hate one another outside of the ring. Allow Zach Ryder to air nothing, but footage of the hate between the two men. Let them work the staged fights stiff in order to sell the natural hatred, and tension between the two men. Barrett could taunt Sheamus during his matches perhaps by burning the flag of Ireland. Put them through a series of gimmick matches, and allow them to develop a real feud with one another.