Johansson has missed the last two games with an upper-body injury but will be a game-time decision on Wednesday. Johansson would likely replace Nick Bjugstad or Nico Sturm and skate on a line with Victor Rask and Kevin Fiala if he plays.
Bogosian was knocked out of Tuesday's game in Vancouver and is expected to miss at least one week. With Bogosian out, Rasmus Sandin will remain in the lineup and Travis Dermott will draw back in.
Merrill will debut on the third pairing with Alexander Romanov and should help stabilize Montreal's blueline. Merrill picked up five assists in 36 games with the Red Wings and has just 12 goals in 392 career NHL games, so he shouldn't be much of a fantasy factor in Montreal.
Foligno has been out since March 12th but will return to the lineup on Monday, when he is expected to be reunited with Joel Eriksson Ek and Jordan Greenway. In the first 25 games of the season when Foligno was available, the Wild were 16-8-1 but were 8-5-2 without him over the last month.
Merrill has quietly been one of the most effective bottom-4 defensemen in the NHL in recent years and is a very nice pickup for the Canadiens. Merrill plays a very reliable defensive game that will make the Habs' third pairing a little more reliable. Victor Mete was placed on waivers on Saturday, clearing the way for Merrill.