It's kind of difficult to tell what will happen tbh. The trademarks for Zi-O and Zero One were both registered in May, so normally I'd have assumed we'd be getting one for the next show very soon. But before that Rider trademarks usually came out in June, so not having a trademark before the end of the month doesn't necessarily mean there's been a delay.Like would they try and cut the series short just to retain their current release schedule or we'll be seeing another W situation where the release date is shifted now?
They had intended from the beginning that Decade would have a shorter run so that W could start in the same year. Before they did that, new Rider and Sentai shows began around the same time and they were worried that they might be stealing sales from each other. And yes, knowing this does make Decade's cliffhanger ending seem even more bizarre.