I assume this move was done due to the injury to Josh Brook who got hurt at the end of last season and is rumored to be out for months though nothing official. So getting Niku for Laval would replace the loss of Brook who imo would have been on Laval's top pairing. Granted there are open spots on the Habs since Weber is likely out for the season and after Petry, Edmundson, Chiarot and Savard, the final 3 spots would be between Romanov, Norlinder, Kulak, Wideman and Niku most likely. Romanov doesn't need waivers to be sent down, though I would expect him to be in the Habs top 6. Norlinder is either on the Habs or he has to be loaned back to Frolunda of the SHL. So depending on how he does at camp/preseason, and what the Habs plan is with him, if he makes the team then one of Kulak, Wideman, Niku would likely be on the Habs with the other 2 going to Laval unless picked off waivers.