Well people saying things because they heard other people saying it doesn't make it true, admittedly the explanation for the picture itself seems very plausible but I really couldn't find a proving source. The image was from October so given the amount of months I guess that if itw as proven it never really surprised anyone enough to make the headlines spread like virus.
Also, I know Daisy as the alternate has been going, but Male WiiFit trainer is more than a mere color swap, which Peach alternate colours are, so I hope that for this year we can actually see more changes like her shorter hair, for example.
The Villager was unexpected as he is mostly a customized avatar more so than a character by himself. So it really doesn't sound that out of the possibilities that just like the wiiFit trainer they release a default-girl model as an alternate costume.
Of course all the speculation I am doing based on that image and apparent confirmation of the alternative colours.