Everyone keeps saying this is a HK rip when it really doesn’t seem to be to me, at least no more so than HK was a “rip-off” of Metroid/Castlevania. Neither the combat or the aesthetic is very similar to HK.
I get their previous work has been pretty blatant rip-offs of other games, but where in other games assets and gameplay were near 1-to-1 replications, this one seems relatively original. I suppose the hat-possession could be considered a copy of Mario Odyssey, but that’s all I can make out from the trailers.