There's potential for conflict here, but the Goss/Cav arrangement this year is very different from the Greipel/Cav arrangement last year.
For starters, Greipel basically felt oppressed, as he was not allowed to enter the races he wanted to ride. Thus, Cav's palmares was always superior, but this result was basically inevitable because of their respective race schedules. Obviously, this set-up would breed resentment from Greipel. Next, both Greipel and Cav were very much pure sprinters, making competition for team support inevitable.
Goss, on the other hand, has already completely surpassed Cav at this point in the season by winning a monument. Goss has also demonstrated strength and resilience over testing courses (such as hills and cobbles) that Cav has never shown. Rather than making for a worse situation than with Greipel, however, I actually think this fact should help the Cav/Goss relationship. Now, it's impossible for Cav to say hurtful things like 'all of Goss' wins are sh*t wins in little sh*t races' or whatever else he might say to keep Goss down. Instead, given Goss' results--and the fact that he's less of a pure sprinter than Greipel or Cav--should make it a lot harder for Cav to whine about whatever management decides. Meanwhile, Goss can't hold top form forever, and by now he should be content to let Cav go for some gt glory after Goss burns his last spring candles at Gent-Wevelgem.
As for next year, Cav to Sky--for a lot less money than Sky would have had to pay if Cav had gotten his **** in gear this spring.