Board Thread:Plants vs. Zombies Heroes/@comment-27101994-20170516031112/@comment-25089892-20170516203138

From what I see:

Aug 1 - 8 = Massmorph

Aug 8 - 15 = Forget-Me-Nuts

Aug 15 - 22 = Hover-Goat 3000

Judging that they are just adding recently made Event cards right to the schedule, the schedule might go like that after that:

Aug 22 - 29 = Imp-Throwing Imp OR Atomic Bombegranate

Aug 29 - Sep 5 = Atomic Bombegranate OR Imp-Throwing Imp

Zombology Teacher and Unwanted Gifts most likely went into the development hell.