Ideally you'd go megatron and boldin. Since its looking like johnson won't play, I'd go Royal, Boldin, and Burleson. I think that will help your receiving core while not hurting your solid running back group. Royal could be a good play against baltimore. You probably wont have a 25 pt fantasy week from any of them, but they should be solid.
Bolds indicate weekly starter
RB: Jones-Drew, Cedric Benson, Kevin Smith, Stewart
WR: V Jackson, Colston,Burleson, Bowe, Cotchery, Nicks