"We need a great final, that would top it off," he said.
"Generally World Cup finals, when you look at football, they're not memorable games. I think it will be a great tournament whatever (happens) but it would be nice for both teams to go out and (put on a) show because they are those sorts of teams. It's their natural game to play that way and it would be great to see a real three-tries-to-two sort of game.
"I think these are the two best teams of the tournament. I don't know what the odds are but I think New Zealand would be the favourites."
Johnson said earlier in the week he had favoured Australia but was now revising his view.
"Honestly, after the semis, I had this weird thought that Aussie might nick it. But as I sort of rationalised is this week, I've wondered why I thought that. The Aussie team is still a little bit unknown because they haven't got a huge great run of form like New Zealand has coming into this. I think it's just set up for a cracker.
"I think what we all want to see is a cracking game. Finals are obviously going to be tense because they're finals. But the last two or three (finals), particularly the last two, have been very cagey affairs. I think people are anticipating and hoping both teams will be a little bit unshackled from the pressure which is easy to say when you're not playing. There hasn't been two tries in a World Cup final since the first one."
Johnson admitted England's failure at this Cup had been galling.
"How many English players would make a World XV? I think I know the answer to that question and it's not good," he said. "England needs to develop some world class players."