Hela and Thanos? Honestly, that's a pairing I never saw coming in my years of scrolling the 'Thor' and 'Avengers' tags. Most writers seem to treat them like two dark gods clashing over a cosmic chessboard, which is fine, but predictable. The best tropes I've found dig into something far less about power and more about legacy. They're both children of planets, really—Asgard and Titan. A story that explores them as the last scions of dead worlds, comparing their grief and the vastly different ways their heritage twisted them, offers a fascinating mirror.
Instead of enemies-to-lovers, which feels a bit forced given their personalities, I'm drawn to narratives of uneasy alliance. Imagine a 'What If' where Thanos's quest for balance isn't about the stones but about restoring something lost, and Hela, fresh from her imprisonment, sees in him a kindred spirit of annihilation. Their dynamic wouldn't be romantic in any traditional sense; it'd be a chilling study in mutual recognition. The best fics I've read play with their dialogue, making it sharp, philosophical, and devoid of sentimentality.
One trope that rarely gets enough attention is the 'Heir and the Conqueror.' Hela is the rightful, if deposed, heir to an empire. Thanos is a self-made conqueror who sees empires as failures to be corrected. Writing them as rivals fighting over the same galactic territory, but with fundamentally opposing ideologies of rule, creates incredible tension. You get these amazing strategic conversations layered with personal disdain. It's less about shipping and more about watching two immense forces of nature try to outmaneuver each other's cosmic worldviews.