I see why people are questioning the status of our WRs, but I don't read much into these things before regular season starts. Giving too much info is much like showing your hand in poker. Every year we see these head scratching injury reports - yet they are usually ready for week 1.
I would rather see them take little part in preseason and focus on being ready for games that matter. If they have to miss the first few games, so be it - better they are ready to close out the regular season in good health and ready for a playoff run.
It sucks not knowing, but they have a method to their madness.