It's just that the mermaid speculation part is mostly actual bits of tangible evidence from the show, whereas the Tomckie speculation appears to be mostly reaching and reading too much into names, as well as relying too much on the """leak""". I'd personally separate the two because I do actually take the mermaid part more or less seriously. I'm not saying that Jackie is totally a mermaid or a half-breed or something, but there is definitely something fishy (no pun intended) going on with her, and I'm convinced it's building up to something. Maybe I'm wrong, but it'd help to separate actual evidence from the more tinfoily bits.>Tom's a demon prince, so he'd need to end up with someone who's also at least somewhat magical and related to royalty
By this logic, Marco shouldn't be with Star (or Jackie if this theory happens to be true) because he's not royalty.