This months summoning events

I'm asking this to better manage my F2P orbs this month

According to the event plan there will be a new "Special Heroes" summoning event in 16 days followed by another tempest trial named "alliance of princesses".
Will that be the new years units one or the beast unitscoming to FEH?

And another one 25 days away, wich confuses me as the will only be 10 days between it and the Princess one

Any predictions/thoughts?