Kulock said:
What were their plans for the next season?
From Wiki:
These episodes were only in the very early concept stages (Or various stages of production) at the time of the series' cancellation. They did not even enter the production or animation stage. Disney never confirmed if they had been completed nor why they were never aired.
Yours, Mayan, and Ours - Taurus Bulba was intended to return in this episode to seek an artifact located in Africa that will restore his organic body, however it requires four elements (Electricity, Water, Nature and Fire). Darkwing and Gosalyn were intended to make a trip to Africa to for a school project and countered an African version of Darkwing.
The Perils of Parmizon the Planet Eater - Cometguy was intended to return including an introduction for a new villain.
Pranks for the Memories - Paddywhack was intended to return.
Opposites Attack - Negaduck I was supposed to be released from Darkwing's body while he is fighting with Negaduck II, which soon results in an unwanted alliance between D.W. and Negaduck II.