Blum will be in our top four by the end of next year. He's too good to stay in the minors for more than a month.
Admittely, my experience in seeing Blum play is only the preseason here in Nashville and the WJC's. However I was NOT impressed with Blum at the WJC's. He was a turnover machine and didn't do well defensively. Just from what I saw there he didn't look ready to me.
Edit: He still needs to put on at least 10-20 pounds of muscle too before he can handle NHL forwards.
I haven't heard anything to suggest he still would be on the IR by the time the Preds are ready to trade him. I also think there is no doubt that a team would want him. He is clearly better than many 6th and 7th defensemen on teams that are contending. His salary is high but lasts only through the end of the year. I don't know what he will garner but he has trade value.