Forgive me if someone already pointed this out upthread. One of the main challenges with the comic book version of Infinity War is making Thanos' romance with Death credible, so they went another route in the MCU. But they could have made a romance with Death personified credible inasmuch as two movies back (Thor: Ragnarok), the villain was a female personification of Death. So why not work Hela into the plot of Infinity War as the object of Thanos' affection?

Ehhh, Loki already died at the end of Thor 1 and Thor 2, so I'm sure the Goddess of Death can figure something out. Of course, one of the problems with Hela in Thor:Ragnarok is that she wasn't the Empress of the Underworld; quite the opposite, her power specifically derived from Asgard, and that's where she wanted to be, sitting on Odin's throne. There's no concept in the MCU of an Hades-type Underworld populated by the spirits of the dead. Maybe that's a can of worms they didn't want to open, or maybe they just realized that a Hela like that wouldn't want to conquer Asgard and thus was hard to justify as a main villain.



I agree. Also, the right way to depopulate the universe is not to change the absolute number of people (by killing half of them), but rather by lowering the acceleration of population size (i.e. the growth rate). If the population of the universe is growing at 5% per annum, then in 14 years, it will be right back to the population that Thanos was working so hard to avoid. Then he'll have to make another glove, find a new power source, etc. But if he simply adjusts the birthrate to equal the death rate, then the problem is solved without anybody having to die prematurely at all. That would have been pretty funny for the heroes to see him snap his fingers, and then nothing dramatic and obvious happens at all, yet his plan succeeded.