A Malkin owner in my league is unhappy with Malkin, and the recent knee troubles have definitely made him uneasy. A few days ago he said he would trade Malkin to me for Zetterberg.
I know this seems like an amazing deal, but right now Malkin is playing less than stellar and I'm also worried about his knee problems down the road (this season). I can't afford more injuries right now as I've got Lecavalier, Stewart, and Kane.
Someone has a post on this same thing as well..so you can read my more elaborate comment in there...but i'd personally stick with a surefire 80-85 point option in Zetterberg over Malkin as long as your in decent position to win as is...if not then i'd go the more risk/reward route in Malkin