Theodora
Arcane
But aren't magical engine updates precisely what is promised here?
I assume it'll still be recognisible. I don't know why they aren't just calling it a sequel (maybe they don't plan on any real sequels and hate numbers), perhaps it'll be small content-wise. Stiill, there's a different between an updated engine and a complete reiteration of it.
Maybe someone can ask them for clarification? Can't be that hard to get an answer from such a small dev.