I don't think Kovacevic can get that.
My rationale is Zadorov got eyes from playing on Vancouver, mentioning he wanted to play for Toronto and his agent (Milstein) is pretty loud and gets eyes on him. He also ends up on highlight reels for big hits and some fights. He also put up unusually high offensive numbers in the playoffs.
Kovacevic will drop the gloves but for a 6'5 guy, he generally averages around a hit a game. He's playing in New Jersey which results in him flying under the radar, I am surprised Montreal didn't even get more for him.
So I won't outright dismiss the idea of a 5x5 offer for Kovacevic occurring, I just think there might be a perfect storm to get him for less. I could get my brain around a 4 year deal to something around 4.5-4.75M range if I had to though. I hope he had some Leafs pajamas growing up.