I have it on good authority that the F90 M5 Competition Package goes into production beginning of April.
One more piece of information from the same source: Competition package will come in at
625hp
The confirmation was given by BMW's head of the BMW Driving Experience at their event in Sweden (going on as we speak) called the BMW M Ice Experience. Invitations to the event are sent to BMW's top sales advisors. Here is a link about the event
https://www.youtube.com/watch?v=oUWUBqMzL3A)
Anyway, do with the information as you will