those superstars you mentioned have not really been part of any real feuds/story-lines that could have matches on PPV, so no i don't see them adding more matches. Barrett is just hanging around the main event but has no feud, Ziggler is going to cash in but again not likely to compete, on Raw he might have build up a possible match with Cena but if it was to happen they would have announced it on SD. Antonio, Truth, Brodus don't really have anything interesting going on. Rey lost the tournament along with Sin Cara so no.
Not Removing Until:
John Cena faces Undertaker at Wrestlemania [ ]
Sheamus and Cm Punk are the 2 World Champions [X] -Wrestlemania 28
John Morrison wins World Title [ ]
John Cena losses cleanly [X]- Wrestlemania 28 Rock Beats John Cena