I figure it has to do with some sort of Momentum and the actual span of Living Human Memory (which should include all the long-lived magic users, even Binder).  Hercules likely landed on the Hulk more because it was un-anchored at the time, rather than popular opinion being strong enough to change Current Mantle-holders.  Otherwise Santa would look more like his current Coca-Cola inspired pop image rather than the Sword-wielding viking hunter we met.

Landed on the Hulk due to the Hulk having what in common with Herc before[/] said anchorage? He'd not be the Hulk to become the Hulk if you see what I mean?

Plus besides green the comparison is pretty spot on, berserker warrior known for sometimes uncontrollable bloodlust. Your thinking popular view, but if popular view were most important Mab would have changed into Elsa by now, or the fairie would at least have drifted from the originals....

besides, this is all a huge misunderstanding. immaterial, but iirc Jim said, "Hulk" no definitive article by placing 'the' before it.... combine this with what we know about Greek Gods trying to stay relevant by Wrestling and we simply have a case of mistaken Hulkity. Baldor is probably the Macho Man too.

Jim has said that Thomas was born on Valentine's day because the universe has a sense of humor.  Literally nothing has suggested that Thomas is also a Starborn other than that Mab said she could take him, and even that was said to put pressure on Harry.

Plus neither the equinox or solstice come anywhere near Halloween.

sorry I misspoke

The 4 cross-quarter days fall between equinoxes and solstices. Halloween is the spookiest one – derived from a sacred festival of ancient Celts and Druids – coming as days grow short and nights long in the Northern Hemisphere.

Halloween in the DF is specifically a time of ending, cross that with Harrys affinity for Death, endings and Winter(which is all over the place), Elaine's spring birthday and her connotations to Summer and her more nature bound elements in casting AND then take Thomas's very specific birthday and the fact he's basically become addicted to feeding on Love via only satisfied by Justine, more or less becoming an addict to a poison, like a drinker, that poison being love. Annnd then maybe you start to realize not all starborn are the same? That maybe they are as varied as say... the stars in the sky?

Another one that has that potential 'good man who saved fallen mother' make up is Molly whom I could point out as a real likely canidate for being Mab's star reborn as she directly effected how Fearbringer was formed in reality and was trained to use fear without breaking the laws by Lea before becoming a winter canidate(or as a result of said training/mirror alignment Mmm?)
But your right literally nothing is outright stated about much of anything in the DF, instead it's left to us, quite intentionally, to fill in the Lacuna.
It's not that hard to do really.... and this is why I was looking for someone to talk to on the level, not listen to what we already know for sure. Iff'n I wanted that I have the books, yea?

Starborn theory:

One of the prerequisites of being a starborn is that the individual has to be born in every existing splinterverse.  They might die at different times, but at their beginning, they carry the potential to influence every version of reality.

I'd agree with the result but i'm not sure about the method of getting there?

Yea you can probably keep that to yourself guy, instead of intentionally dumping some negativity here.

I think it was just the foreshadowing of the weirdness to come. not a fallen angle having no reason to pay attention to him.

If you recall in DM Nico had very specific intelligence on Dresden, and he did know his mother so 'no reason' is suspect too.

Ah..haha, no, Grevane does not work with corpsetaker lol.
An idk if you can say you've done enough theorizing, you've certainly plumbed the depths of your current perspective theories, but that's a narrow width compared to the broad range of views. That's why I read and try to justify, or negate theories here.(to myself mostly) Cause they should either open my own perspective larger, ergo creating a larger pool from which to theorize, or show me what's not there to springboard from.
Your own crazy Murphy=Mab theory made me realize a couple things for instance, one which was more or less confirmed by a fellow urban fantasy author/nerdgasm by.

Was wondering if anyone here would like to help me delve deeper into my theories by pointing out things that need structured, questions that come up or other organization. Would need the ability to suspend disbelief in idea's not your own, ability to organize large bodies of information and abstract conceptualization.(so you can understand me lmao) Plan is for irregular intervals of work until I can get some steam going again... I lost a year of my time to video games when I finally bought a ps4(they announced a 5th the next day, go figure...) and am need of help getting on point again..