new Who campfire trailer

it's got great imagery except... it's got me worried. Because of stuff that's been leaked about the finale (well what you expect when you're filming in the streets of Cardiff? You're bound to attract some attention.) Anyhooo Donna sat around a campfire telling a story (and oh, reminding me of last season's Martha playing her apostle bit to the Doctor's Doddy the House-elf messiah) and the last line - "He'll come back to save us and this time I'll be ready - and just like that - pouff - we'll be gone." Why does that sound like a lead in to yet another 'reset button'? Or is that just me projecting?