Guys, are you serious? In most cities, even 15K is way ambitious. It makes absolutely zero sense to have a huge arena with 20,000 seats for a hockey game in Russia. Potentially; only Helsinki, Moscow and St. Petersburg could get over %75 attendance throughout the season and this is the best case scenario. For hockey, anything over 10K is perfectly more than enough for KHL. Except for the ones in NHL, only one or two teams can regularly fill an arena that has a capacity over 10K.
Not even in St. Petersburg will people fill a 20K-seater arena regularly to watch Avtomobilist, Vityaz or even Ak Bars. You don't build such a huge place only for a couple of games a year.
Russian soccer isn't great standard, where as hockey is!
Plus who wants to stand outside in -20 weather watching something so boring? Unless you're at a Bandy game there is no point.
I beg to differ. For every one guy who likes hockey, you can find ten following football. For you, it might be boring but the rest of the world thinks otherwise. Moreover, there are more games in hockey so it is not accurate to compare attendances. It's not only a matter of money but time: even a very rich person who's in love with hockey may find it very difficult to attend three home games in a week in hockey, while in football you just have two or three games a month for most of the time.
In Russia, we can see 20K+ arenas maybe only in Moscow and St. Petersburg which will probably not even host KHL games regularly - only the most important ones. Other than that, this is just a fantasy. Ufa, Kazan, Omsk etc. doesn't need anything new. 1o to 12K is good enough for Magnitogorsk, Novosibirsk and many other cities. Some people terribly overestimate the importance of having a brand new arena. As highlighted by another user, we've already seen that it doesn't change much, in Astana. People won't suddenly show up in a building just because it looks nicer. Attendance increase solely because of the infrastructure may be at around %10 and not higher. It also has to be kept in mind that only a handful of teams in KHL are consistently decent. Good luck filling a 15K seater in Vladivostok or Magnitogorsk when they win only once in five games.