First of all the list from sovsport.ru looks a bit different (maybe someone else already posted this, haven't seen it yet):
Известна почти треть состава сборной России в розыгрыше Кубка мира по хоккею. Среди десяти игроков, которые уже дали согласие на свое включение в расширенную заявку (31 игрок), трое представляют российские клубы. Это - защитник Олег Твердовский («Авангард»), нападающие Андрей Николишин (ЦСКА) и Александр Овечкин («Динамо»).
Кроме этой тройки подтвердили свое участие в КМ семь представителей клубов североамериканской Национальной хоккейной лиги - защитники Сергей Гончар («Бостон»), Андрей Марков («Монреаль») и Александр Хаванов («Сент-Луис»), нападающие Максим Афиногенов («Баффало»), Олег Кваша и Алексей Яшин («Айлендерс»), Сергей Самсонов («Бостон»).
(No Zubrus, Kvasha included, more realistic imho, even though Nikolishin doesn't play for CSKA, of course...
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What concerns Tverdovsky: He absolutely deserves a top-6 spot on Team Russia imho. As Wilka pointed out, he played a fantastic season for "Avangard" (he was named MVP). Imho it's important to pair him with a solid stay-at-home defenseman and he'll shine (but a pair like Gonchar & Tverdovsky would really hurt the team).
Btw: Tverdovsky was part of Team Russia at SLC.
Ovechkin: I completely agree with Raimo Sillanpää. Some people might call me nuts, but I'd definitely pick a solid role player like Korolyuk or Brylin over Ovechkin for this tournament (and they're used to the smaller ice surface and the permanent clutching and grabbing...). The "pick all the highly skilled and flashy offensive players" approach just doesn't work imho (don't get me wrong, I want to see Kovalchuk, Datsyuk, Frolov, Afinogenov... on the team, but offensive skill doesn't guarantee success at such a tournament, especially considering the fact, that it will be officiated by NHL-refs...
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Great to see Nikolishin on the team (no way he's overrated, his defensive play is likely underrated imo). Add Korolyuk and Brylin (not gonna happen, I know) and Team Russia would have a solid "checking line".
Khavanov: Somewhat surprising. I'd pick Malakhov, Mironov, Kasparaitis, D. Markov, A. Markov, Gonchar, Tverdovsky, Kalinin and maybe even Zyuzin over Khavanov (not to mention Zubov and Zhitnik who likely won't play).
Is Ruslan Fedetenko eligible to play for Russia?
No, he played for Team Ukraine several times (including the Olympics '02).