As it stands, Detroit is currently in a wild card position and is tied with the Maple Leafs for points but has played one more game. They are only six points behind the Bruins for first in the division and the addition of Kane could launch them towards being true playoff contenders.
Things could always fall apart though and it could result in Kane being moved out. There are some locks to be contending for the playoffs come the trade deadline including the Toronto Maple Leafs, Boston Bruins, and New York Rangers, all of which had interest in Kane.