If it's a hoax I'll be disappointed but not surprised. I do however think that it could very well be true! The only thing that's holding my enthusiasm back is the fact that it wasn't long ago that IGA said that the project had been put on hold. It seems kinda sudden if it pops up now. He must've been working a bit on it in secret if that's the case? Though maybe he just veeery recently got a couple of people on board and decided to go ahead with it anyway. If this turns out to be an actual game I think it will be AT LEAST a year until release, possibly more. I highly doubt they have been able to do much, if any, real work on it.
But in order to do a succesful a Kickstarter you need to have at least something to show. IGA may get the most passionate fans on board by just putting his name out there, but it takes more to convince others. IGA is not Inafune, after all.
Though there were those screenshot from the flyer, obviously. They were either taken from some kind of prototype or they're nothing more than concept graphics.