If it is, then I smell a flashback and redemption for Tobi. Unfortunately it's entirely too convenient that Kakashi's there. Because this fight could go down like the Kabuto one, where Naruto doesn't have to sully his hands. And if Tobi isn't interested in resurrecting a completed Juubi, then Naruto's dodged another bullet of having the kyuubi removed. So Tobi could cleanly be dealt with by Kakashi with no adverse plot effects.
Tell me again, what was the purpose of Tobi luring Naruto into battle if he could have already gotten what he needed from the Golden Twins?
All of those things make it very convenient to do away with Tobi (having Naruto's kyuubi chakra without actually having to disable Naruto, and having the hint of Tobi's making being tied to Kakashi somehow) without actually having to have Naruto do it, or have a reason to do it. Tobi's not actually going after Naruto anymore and Kakashi has the most reason to defeat/redeem Tobi if he's really Obito.
Well, I'm sure Tobi originally wanted to get Kyuubi and whatnot, but he's obviously having difficulties doing so, added onto that, Kabuto failed and he doesn't really have his jinchuuriki trump cards anymore. As most desperate villains do, he took a shortcut and worked with what he had. That's what I believe anyway.