If this ends up being true, then this is how I see it.
1) For the people that keep mentioning the Tencent money, stop. Companies don't just walk up to studios and give them money without contracts about said money being used in specific ways.
2) If, and this is the biggest if, Platinum got the IP back from Nintendo, they managed to get it cheap using their own, not Tencent's money. I could see some weird scenario where it was part of the deal for doing Bayonetta 3, but I highly doubt that.
3) The KS goal will be for funding a pretty small internal team for around a year. I'd imagine the target would be somewhere in the ballpark of 300-350k. Maaaaaybe 500k. Considering there are boardgames that routinely make millions on KS, I could see this working for them. It's a known commodity. Platinum has a solid fanbase, and many of them never got to play this.