Wow. We just got S/M like six months ago. Are people really tired of them already and actually expecting a new core game this year?
Well we got Or/As a year after X/Y, so it's not implausible that we'd get a new game a year after Sun and Moon. I didn't have high expectations for that in the recent Nintendo Direct however. To me it just didn't seem like it was hyped up enough to have info on a new main Pokemon game unlike some previous ones.