
Judging off Sakura's character, it would make sense if she avoided Naruto a little bit because of the small dispute they had in Tsunade's office (Naruto was being reckless and threatened to interrupt Shizune's investigation, and, though she was unaware of his reasons, Sakura was somewhat insensitive to Naruto about it). However, I wouldn't expect them to be separated for too long. If this happened, more than likely Naruto would be the one initiate conversation (and once again, inspire Sakura to become stronger). Of course, you're correct when you say it's merely a guess.
However, I don't expect Kishimoto to end his series with another couple just because it's the more popular one. He's mentioned that he hopes to end his series with two canon couples, one of them involving a requited love. As we all know, AsuKure was the first couple that was canonized in the series. Judging from the events of the manga, Kishimoto appears to be developing the NaruSaku dynamic into something more than many fans admit (it's one of those "reading between the lines" scenarios).
I'm not going to lie, I've been pulled back by my hair into disputes by other fandoms who continuously try and tell me that their specified shipment is going to happen, but they aren't generally the kind of people who absorb everything that they read in the manga: Sasuke's far away, and Sakura is spending far more time with Naruto than she ever did him, and as it currently stands, it's enough time spent to make her question her feelings toward Naruto. Despite the fact Naruto considers Hinata a friend, they haven't spent nearly the amount of time together that people would expect from a long, happy relationship beginning. Right, so it took three chapters for Naruto to understand Hinata wasn't a freak all along... and?
It appears to me that people aren't paying attention to the kinds of relationships Kishimoto gives to us: We have Tsunade and Jiraiya (unspoken, but definitely still there), and Asuma and Kurenai (I'm tempted to throw in Minato and Kushina, but we don't really know a lot about them). Aside from being adults (and Konoha ninja), what do all of these people have in common?
Time.
These relationships did NOT happen over night, or a matter of a couple of weeks. It took Tsunade about forty years before she finally admitted Jiraiya's impact on her heart. It took Asuma and Kurenai a couple years before they got married, in which it was implied they spent a lot of time together. When you also look at it, both of these couples knew each other. Is this how it is with NaruHina or SasuSaku? Do these girls and boys really know each other, do these boys really take the time to get to know the girls that crush(ed) on them? Are they as willing to spend time with these specific girls as they are others? The answer to each of these questions is "no".
Kishimoto's already told us what he looks for in creating relationships, and both SasuSaku and NaruHina are severely lacking in this qualities.
So, I don't think there's any reason to be concerned, but that's just me.
