We have internally determined a launch date for Season 5.
The date will be revealed once we are 100% sure we will be done with all the additions and changes we want to make, but it will happen before summer.
It is likely that there will be no major patch before release.
It is unlikely that we will announce next Season start one month in advance such as last times, but the daily reveals leading up to Season 5 will come back (in a shortened form).
Not much longer!