Knowing the Patriots, we probably wont know with one hundred percent certainty if Brady is in fact going to play until game time, but if he does play, don't expect to see much of him.
Assuming he does play, he'll likely get the start, but it surely won't feel that way. Brady will not have Julian Edelman, Danny Amendola, Rob Gronkowski or Malcolm Mitchell to throw to on the outside, but still does have some intriguing targets.
With Gronk out, Martellus Bennett will assume the starting TE role, and FA acquisition Chris Hogan is set to make his Patriots debut at WR. Both players are new comers to New England, so having them as Brady's first and second options will help the two sides work together and hopefully build as much chemistry as they can in what will likely be just a few plays.
The same goes for Nate Washington, who was brought in this offseason and is currently fighting for a roster spot.
Entering his 17th season in the league, there really is no appeal for Brady to play much at all tonight. Additionally, Bill Belichick has reiterated all throughout camp that the priority is to get Jimmy Garoppolo as ready and as prepared as they can, so his time with the first team is far more valuable than it is for Brady.