When Cesaro was presented with the "Andre the Giant Memorial Battle Royal" trophy by Hulk Hogan, Zeb Colter took the microphone to speak for him. Zeb bragged about himself taking Cesaro under his wing and making him a "Zeb Colter Guy." Rather than agreeing with him, Cesaro announced that he was actually a "Paul Heyman Guy" and Heyman came to the ring to speak for him.
Many in the audience supported this transition, but that doesn't guarantee that things would go smoothly. Zeb was furious about it and of course, Jack Swagger made his way to the ring and attacked Cesaro from behind. Swagger then proceeded to destroying the trophy and fighting his former tag team partner. Cesaro has officially left "The Real Americans" group and will likely feud with Swagger for some time before moving on.
The alignment with Heyman is somewhat questionable though. Brock Lesnar and Heyman have been playing the heels (bad guys) all this time and still were on this same episode of RAW. However, Heyman was treated as a face (good guy) for aligning with Cesaro who is no longer a heel. If Heyman continues to play both roles and switch back and forth as he manages both Lesnar and Cesaro, I think it is only a matter of time before Cesaro's interests do not align with Heyman or Lesnar...which could lead to a feud between them similar to CM Punk vs Brock Lesnar.