Kovtun would certainly have a good chance at medalling, maybe winning: Han Yan (the reigning champion) is being sent back to JWC (stupid move from the Chinese Fed IMO), and Joshua Farris and Jason Brown will almost certainly return, unless both have outstanding Nationals results and get sent on to 4CCs (Farris maybe an outside chance for Worlds). In fact, the Junior Men could be an amazing fight, with quads all over the place (maybe even Brown by then, since he said at JGPF that was his next stop). It certainly would do no harm to Kovtun's ranking or his reputation to be in that fight.
Basically, I think the Russian Fed at the moment, has the skaters ranked in order of preference for the Worlds spot:
And the only reason Gachinski is getting the nod at the moment is because Menshov is so old. I wouldn't send him at this point and IMO the Russian Fed are still punishing Gachinski for the Disaster in Nice - conveniently forgetting that Voronov was there too. But if it's two spots they want, I'd be reversing that order. Menshov's got what's needed. Gachinski has a proven good record (and a bad one, but he seems to be improving again...slowly). Kovtun is young and inexperienced - one JGPF championship does not a Worlds competitor make. And Voronov has done what, exactly, on the world stage?