Okay, we can reasonably assume that Naruto, Sasuke and Sakura are going to grow up to be the next generation of Sannin. This is heavily, heavily implied over and over again, so let's not argue that point. What does that mean? As a trio they will become extremely powerful and famous. Naruto is likely to become Hokage at some point, so he will become as powerful as a Kage, probably discluding the Kyuubi power. As Sannin they will also be on the same level with each other, maintaining the Sansukumi balance where Naruto > Sakura > Sasuke > Naruto. But Naruto has the major, major advantage of the Kyuubi. As an adult he's going to have more power at his disposal than, well, anyone. That means also that Sakura and Sasuke are going to have to keep up with him somehow if they can be worthy of being Sannin with him. Sasuke's "superpowers" are obvious. The Sharingan, with all its many and varied powers; possibly the Mangekyou or some other evolved form of the Sharingan; and possibly the Curse Seal, which he may or may not keep as an adult. But Sakura... Sakura doesn't have any superpowers. No blood limit, no sealed demon. Nothing. Maybe she'll be able to break mind control jutsus with her Inner Sakura, but that's not exactly going to let her keep up with the other two. Preskip Sakura was, well, pretty useless as a ninja while Naruto and Sasuke were pretty damn good for Genin even excluding their superpowers. Postskip, however, Sakura has shown a simply amazing level of growth. In under three years she managed to seemingly master the medic-nin arts, as she was not only able to remove the poison from Kankurou's body instantly, but she was able to make an antidote for Sasori's super poison which not even Chiyo could do. Chiyo said then that the only person more skilled at antidotes in the world was Tsunade, which would put Sakura up there in the top three (depending on whether she's better than Kabuto or not). That is an AMAZING growth in three years. From useless to world-class medic-nin. Considering how long it takes for people in the real world to become doctors that's simply ridiculous. And what makes it even more amazing is what Kakashi said in 246 - Sakura is not a Ninjutsu type, she's a Genjutsu type. She hasn't even started to seriously study her own speciality. So if Sakura doesn't have her own superpower, is she going to make up for it by just being that damn good at regular ninja powers? Is she going to be so good at medic jutsus and so good at Genjutsus that she can make up for not having the Kyuubi or the Sharingan and still be on par with the other two Sannin? Because at the moment that's what it looks like. Sakura will eventually be the greatest medic-ninja in the world, since she will surpass Tsunade. At the same time she's probably going to be the greatest Genjutsu user in the world as well, even without Doujutsu. She's going to be either the strongest or one of the strongest ninjas physically thanks to her chakra control, which will also be one of the best if not the absolute best in the world. So, in terms of pure ability and nothing else - is Sakura the best? It certainly looks like she's going to learn more and master more under her own power than anyone else.