Some novels have a initial premise that is WAY different from the rest of the novel.
Like a slowpaced mystery with a comparatively weak protagonist trying to uncover the truth aided by a cheat. But after the first arc (50-75 chapters), the story focus becomes battle like other xianxia.
This happens in Get Lost's novels - Way of the Devil and Mystical Journey. Maybe in Wizard's World as well, though I don't read that novel.
As for me, I like Get Lost - actually, I like multiple world transmigration that is the main plot in all his novels but I think that gimmick would be annoying for readers who came to expect smart MC giving up his wits for punching power.
Any other novels with changing story premise?