[shadowofneptune]

Those two choices sound like statements: 'here is what is next for remote working.' It's instead asking where remote working will go, and 'what next' is the expected form there from my experience, though it's usually seen on its own as an exclamation. Contrived example: "I've seen my boss, the Mayor, and the Governor walk through here! What next? The president?"

[taeric]

I don't know, that still feels wrong. The "What next?" in the contrived is "What [will I see] next?" The "what next" in the title is short for "what [is] next," which feels specifically made for "what's next."

Though, in general, just a too long title that doesn't flow well without hints for where the pauses and inflections should be.