His likely inclusion will prompt another spine reshuffle and mean that the Warriors could have their fourth different halves combination in the space of four rounds, with either Chanel Harris-Tavita or Kodi Nikorima making way from the starting thirteen.
"We have got a bit of a decision to make there," admitted Brown.
The coach said that Harris-Tavita had turned himself into "a bit of a utility player" in the pre-season while Nikorima has always been versatile.
Nikorima struggled in round one and was dropped, after getting the nod following a good performance in the All Stars game, while Harris-Tavita had an off-colour game against the Tigers after an encouraging display the previous week on the Gold Coast.
"We certainly don't want to be changing combinations very much and changing people from one side of the field to the other," said Brown. "But we'll work our way through that when we know Shaun's 100 per cent."
Johnson's return would be a considerable boost. Though he had some sloppy moments in round one, it was more sweet than sour and his kicking game and general organisation was sorely missed over the last two weeks, while he is the most creative player at the club.
Overall, it's been an underwhelming start to the season, but Brown is confident they are on the right track and the gains made in pre-season will soon manifest on the field.
As an example, he pointed out that last Friday's effort to hang on the last 10 minutes against the Tigers despite being reduced to 12 men was a sign of their improved conditioning.
Brown also said that the round two performance against the Gold Coast, aside from a lapse early in the first half, was encouraging.
"I thought after that game we would come out last week and play better than we did," said Brown, when asked if they are far away from clicking. "So I can't give you a guarantee. But we know what we need to do and hopefully this week we [have a] group of people that actually play pretty solid rather than get such a big fluctuation in performance from individuals."