Others have already provided the arguments for the no-brainers Datsyuk and Weber. It feels weird not to include Datsyuk's teammate Zetterberg since there was one player spot left unused. But at the same time, this would have been the perfect year to induct Datsyuk's countryman Mogilny. Now Mogilny will probably have to wait for Putin to get out until he can get in. So, that begs the question... why Roenick over Mogilny?
Personally, I like to emphasize the playoffs and international best-on-best tournaments more than your average joe. I think they're important. It seems to me that you're supposed to win hockey games. Especially playoff games and tournament finals. And it seems like the players themselves feel that way. I have yet to witness a player who dreams of winning the President's Trophy over the Stanley Cup. This is why I prefer to look at the overall season totals (RS + playoffs) instead of just listing the regular season totals and using the playoffs as some king of a tie breaker. Here's how Roenick and Mogilny fare in this matchup NHL wise:
Jeremy Roenick: 1517.566+772=1338 (46th best all-time)
With Roenick, what immediately stands out is his consistent prime production. He finished top 50 in total points 14 times within a 15-season span between 1989 and 2004 (albeit just barely in a few of those seasons). His best positions on the season total charts were as follows:
Total goals 3-11-12.5-15.5-19-30.5 (next best: 33rd in a year he scored just 64 points in 85 games)
Total assists 15.5-21-23-23.5-24.5-26 (next best: 37.5)
Total points 4-6.5-16-20-23.5-29-35-40.5 (next best: a bunch of seasons in the 40-50 range)
Clearly, Roenick's main claim to (hockey hall of) fame is finishing 3rd in total goals and 4th in total points in 1991-92. The players ahead of him in points? Mario Lemieux, Mario's linemate Kevin Stevens, and Wayne Gretzky. We might also mention the Hart Trophy winner Mark Messier, who finished 5th with a slightly better point/game average than Roenick. Brett Hull also deserves a mention with his ridiculous 74 goals in 79 games. Roenick came 5th in the regular season -based Hart voting before helping the Blackhawks make it to the Stanley Cup finals in a key role. They eventually got swept by the Lemieux-led Penguins, but all the scores were very even. By all accounts this is a magnificent season for the mere mortals not named Lemieux/Gretzky.
Alexander Mogilny: 1114.512+606=1118 (91st best all-time)
Mogilny's production on the other hand is all over the place. And a part of it is due to injuries. Even ignoring his rookie year, there are 3 seasons between 1997 and 2000 when he not only fails to make the top 65 in points, but places tied 90th, tied 109th and tied 125th. But the peak is impressive:
Total goals 1-5-6.5-11.5-28.5-29.5-32.5 (next best: 38th = tied 35th-41st)
Total assists 23.5-27.5-28-35.5 (next best: 43rd = tied 41st-45th)
Total points 9-9-10-14-27.5-31.5-37-39 (next best: 41.5 = tied 41st-42nd; then 63)
Mogilny's main claim to (hockey hall of) fame is leading the entire league in total goals with a ridiculous 83 in 1992-93. What makes it less impressive than Hull's previous season however is the fact that Hull led his team in scoring by *43* points (Adam Oates was traded to Boston that spring, but even he was way behind Hull at that time). Mogilny on the other hand finished second on his team in points behind Pat LaFontaine, who was at the peak of his powers. Nonetheless, this is a legit Rocket Richard Trophy for me. Mogilny deserves it ahead of Selänne.
So, if we emphasize top 10 finishes, then Mogilny is ahead. But beyond their best 4 seasons, Roenick is easily better. And I would argue that his 91-92 season is at least on par with Mogilny's 92-93 (when Mogilny received zero Hart votes while linemate LaFontaine placed third). Plus his 93-94 season (tied 6th in total points) matches any other Mogilny season. And Mogilny was all about offense. I think both players are ultimately HHOF worthy, but I don't see a huge injustice here.