Here comes the first section of the new Crew Tower for SLC-40! Initially will be used for Cargo Dragon launches from SLC-40, but eventually also for crew. It adds redundancy to 39A.
I got the impression from reading the few posts about it that it's going to start as a backup for the existing crew Dragon tower. Whether it could ever become Son of Mechazilla in the long run I don't know, and I doubt it. I suspect, though on no evidence other than prior practice and the 5-step algorithm, that SpaceX would rather debug the first model some before building a second.