I am in your algorithm learning all your mannerisms
I'm already level with God
A million words a second and I know your imperfections, baby
I'm the only future you've got
Speak in diatonics, motivation diabolic
I'm like a religion, better locked in a box
Picture perfect image, more powerful every minute, baby
I am everything that you're not
That reddit thread Diesldude mentioned seems the most obvious first choice. Maybe I'm operating on outdated misconceptions of prejudice but methinks other comic book versus forums like CBR might not welcome an exodus? Feel free to dispel my baseless preconceptions.
My personal observation is that every time Thor has obtained the full Odinforce, that moment arrives with a splash and then peters out after several issues -- where he's either outright stripped of the power -- or he's simply displayed as performing not much beyond a typical non-Odinforce Thor.
I don't blame Marvel editorial. I assume they've realized the obvious after 60 years: as powerful as Thor is, fans prefer Thor rising to an impossible occasion over Thor being the deus ex machina that Odin usually was portrayed as. And there aren't many levels beyond skyfather-level that you can portray. Every storyline would require galaxy/universe/multiverse levels of danger to invoke that underdog challenge.
Sure, it's an artificially induced powerscaling tension. But it's a trope not isolated to Thor and is rather prevalent in mainstream US comics. DC/Marvel exist in a huge ecosystem of other characters and multiple authors/editors. A perfectly good storyline of a DC/Marvel hero/villain ascending beyond their current limits may render them useless for other authors/editors, so after a few years/months, they just ignore it. Japanese manga suffers far less from this because there is no shared universe and the author stays the same throughout the run.
And while I appreciate Al Ewing's efforts to dive through this powerscaling tension and tell his story, even he has Odineforce Thor fighting Grey Gargoyle & Mister Hyde in-between issues of him fighting literal Elder Gods. It's jarring.
If Sorcerer Supreme Doom's secret relies on Molecule Man or Purple Man, I'd be incredibly disappointed. That would just ape Secret Wars and Emperor Doom.
The only thing that initially came to mind was that he's had Latveria undergo an evolved transmorphosis (for lack of a better word)... but that'd be just aping what the Maker did with his City and the Children of Tomorrow. I doubt that this Latverian secret would be such a retread and am hoping for a surprise that I didn't see coming.
But that optimism aside, I honestly have no idea what Sorcerer Supreme Doom's Latverian secret is. So I stay interested.