Stuff that is sitting in baltimore will be unloaded and trucked/trained to another port. Stuff that is sitting in the bay waiting to unload will be redirected to another port. Sure, there will be delays but its not hair on fire. Unloading all the stuck cargo should keep most people employed until they can reopen the channel.
Reopening 695 will take the longest but therea the tunnels and the west side of 695. Again, inconvenient but not end of the world.
New span will most likely be a suspension design with the tower supports far away from the deep main channel such that any large ship would run aground prior to impact.
If you want to show anything for those that perished in this disaster.. SLOW DOWN the next time you are driving through a work zone.