How far removed is Brown from being NHL ready? In other words, how quickly can he replace Hanzal?
He's tall and he's a center. I'm not sure he's a great candidate to replace an elite NHL shut-down center, however. He'll probably never have the same shut-down impact that Hanzal has. If you're asking how soon he can be depended on to replace Hanzal's 40ish points per season? Best-case scenario is year after next. But probably more like a year or two after that. After the draft Hanzal played in the USHL for a year and then the WHL for a year before he became an NHL player. He put up 35pts that season. I'd be surprised if Brown did a whole lot better than that on a timeline that's a whole lot shorter than that.
Brown's strength is in his size, skating, puck-protection, vision, passing and IQ, right? hbk? I don't think he's supposed to ever be the brute-force physical monster Hanzal is. I don't think he's supposed to be the puck tipping goalie-screen Hanzal is. I don't think he's supposed to be the face-off, and shut-down machine that Hanzal is. I don't think they're very similar apart from the size, and puck-protection part.
Then again, I will say that Hanzal was not Hanzal when he was drafted. I'll never forget the commentators at the draft having a laugh at his expense, saying that his plays more like Gretel than Hansel. Meaning he's girly and soft. He was criticized for being soft, and a one-dimmensional offense-only player during his draft. As he became more filled out physically, eventually becoming a big beast, his confidence grew and he developed a nasty streak. It wasn't until he became a pupil of Sutter in Red Deer that he learned the defensive side of the game. Those years after the draft really shaped what he would become in the NHL. The player we drafted is almost nothing like the player we got. Thank god for that.
So how will Brown develop? Who knows. He looks pretty good now. The sky is the limit and his old man was a damn good NHL player before his concussion issues.