The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at You Know, That Thing Where.
An averted/subverted/inversed Morality Chain Beyond the Grave?
Probably has something to do with Last Request? The trope doesn't really mention anything about the request being granted.
Although the example you gave is actually God Never Said That since it turned out Hillenburg never actually said he didn't want any spinoffs to be made, but rather that he didn't think the show would be successful enough to earn a spinoff.
Bob recently died, his last will said "Despite everything she did, please let Alice be part of the family again" but everybody does the exact opposite. Basically, a character makes a wish, but after their death, their wish is ignored or disrespected.
A Real Life example is the creator of Spongebob, his wish was "please don't make official Spongebob spin-offs" but after his death, Nkickelodeon made plans for three new spin-offs.