If Brown is out the first game, I actually might be in favor of starting Morris along with Baynes. A lineup of Rozier, Tatum, Morris, Al, and Baynes would actually matchup very well defensively with Simmons, Reddick, Covington, Saric, and Embiid, which would allow Al or Morris to guard Simmons and make things difficult for him.
It'd also help replace Brown's scoring and hopefully get Morris going a bit more this series.