With the old Crystal logo in the corner and the use of DALI’s Moonlight Densetsu, if this is real, it’s definitely a workprint that was never meant to be seen
The song though is a huge red flag considering everyone has been using the Momoiro Clover Z version since the start of this revival (not counting Bamco & Japanese Sailor Moon Drops), then you look at some of the clips clearly being from season 3 but retouched and then the Kotono narration being the same as the last trailer except the last bit which could be from somewhere else.