We have the release date for Legendary Pack 1 (DLC 12) which is being released March 18th!!!

And Legendary pack 2 is coming this Fall

The Free update is scheduled for March 16th or 17th

FighterZ News
SSJ4 Gogeta will be released March 12th, but for those who have the Season 3 Pass, they will have early access to him on March 10th