this is going to be an awful couple of weeks
http://www.kansascity.com/sports/mlb/kansas-city-royals/article699938.html
Looks like oscar will pick up Vargas' start against Detroit. Also looks like Vargas will go on the DL, which means KC will need another LHP. Probably from Omaha until Vargas is back.
The more interesting roster situation, IMO, will occur when Aoki returns. It's pretty clear Ned likes Ibanez, and has even said Raul likely has a spot when Aoki comes back. Defensively, Raul can play several positions...but his bat has become pretty quiet. At the same time, it seems apparent that Raul is in the lineup every day to see if he'll break out of his batting slump...if he doesn't, will the Royals move or release him?
IMO, Aoki has not added a great deal to this team. He's not as versatile defensively as Ibanez and it's apparent from the quotes of other players that they view Ibanez as an important veteran addition to the clubhouse. Haven't read that about Nori.
As it looks like Aoki won't be ready until after the AS Break, time remains for all to chew this over and for Ibanez to prove he can still hit.