If we dont have any spoilers about the mecanics of the event, it means that it will be the same as the last year. If it would change something, we will know it. Just remember the last events... in halloween, we knowed the new scenario, the new features, because all was new. In winter event, we knowed the houses and the calendar because it was new. With forge bowl, we only knowed the building, because it has been the only new in the event. So, if we dont have any spoilers about it, the event will be the same as the last year, with the only change in the event building.