People are generally taking this short one of three ways...
1) People think it's actually a serious proposal to revive Power Rangers. The problem with that is that the Power Rangers series have been on the air for over 20 years! They continually renew the franchise all the time (new cast, new vehicle and costume designs, show directions constantly changing) so why is a revamp needed?
2) People take this as a parody of the grittier, meaner approach to superhero films. I tend to agree with this view. I think Man of Steel failed as a Superman movie. I don't know who that guy was but it was NOT the character I've read in comics and seen in films and television. Even the worst Superman animated series and the lesser Reeve movies understood the character. Zach Snyder and David Goyer apparently do not! I sorta think that's what's going on in this PR film...
3) It's a kids show to begin with, and it should stay a kids show. I generally agree with this viewpoint. I don't particularly care to see sexualization and amped-up violence -- especially if it's material that's General Audiences/Classic Childrens Literature. I understand that there are adults that have a fetish for that sort of thing. I don't particularly want to see that sort of thing myself but I'm not gonna tell other people what entertainment that can consume -- that's a losing argument on an individual level.
ON THE OTHER HAND... If a studio executive/producer/moneyperson with any common sense runs across a kids property, this short film is an example of the absolute worst thing you can do with a kids series. This HAS been done to milder extent in 'children's movies.' There was a huge controversy with the live-action "Cat in the Hat" movie a few years. I've heard and seen bits of the scenes in question and yeah, those scenes were written in very bad taste (IMHO) and not smart to film. The whole film itself was a disaster. After all, who wants to spend two hours watching Austin Powers cough up hairballs?