Safe to say after last nights RAW, he's not getting it this weekend.
Why do you say that? and do you think he should?
I don't see Barrett winning this Sunday, but I'm sure something will happen to increase the tension between him and Cena. What I'm wondering is, how long is Cena going to be part of Nexus and where does it go? Does Cena stay a member until Mania where he faces Barrett in a match to get out of the group? Does he turn heel and embrace being a part of them? 
I think they may take the Rumble route.
Cena wins Rumble when Nexus eliminate Barrett by mistake. Barrett then orders Cena to lie down for him in a match for the title match at Mania. GM makes winner takes all match at NWO (Cena's WM spot vs Barrett's control over Cena). Nexus and Ex-Nexus interfere and match is a no-contest... GM gives Barrett choice between Cena in Nexus & the title shot at Mania.... He chooses the title Match. Cena is angry he isn't involved in the title match but forces his way in to make the match a triple threat.
Thats one way