>>149041018Manny would've betrayed both his father and grandfather by leaving them imprisoned so he can rule the world with Frida. He forgets about them for decades and only remembers to free them after he's old and tired, and then aliens invade and they all have to fight them off. If you don't believe me you can see it here: https://vimeo.com/877215787
The execs REALLY didn't like the ending, but rather than scrapping it entirely, they decided to compromise by having the crew make a good ending, while the viewers decide which one is canon though a vote. The good ending ended up winning and is the official one.