Several members over at Paralay's forum have put up the hypothesis that Okhotnik adopts the Su-57 landing gear, which is plausible based on what's visible in the photo and also precedent: nEuron's gear was donated by the Mirage 2000, Gripen provided the landing gear for Taranis. Scaling on the basis of this assumption, Paralay gets close to the 18m wing span I derived earlier from the silhouettes on the fins of Su-57 #053. So it seems increasingly likely that we're indeed looking at something a good bit larger than nEuron, Taranis and MiG's Skat, closer to X-47B.