Re: [SPOILERS]Something à la Rin, coming up next: Naruto/Obito; Rin/Konan/Sakura.
You can't connect the obito vs konan fight to it, since nagao was already dead, so it is not the same situation, however, you may be right about the other fact.
What is more, is that Kishi himself said the reason he killed Jiraya, was to let Naruto mature, and let him experience hatred.
But what lies beyond hatred? Obito doesn't have hatred, he has remorse, and he can't accept, what happened in the past. This may be even worse than hatred and pain, since it is the fact, where you don't care about anything anymore, until you change what happened. So it is likely he plans to kill Sakura.
Kishi never gave Sakura much thought anyway, he even calls her "a regular girl" just like Rin was.
However, I don't have the feeling that Naruto sees sakura the same way obito saw rin. So it probably wont work the way Obito could hope. We will see, but quite accurate observation.