https://www.techradar.com/news/samsung-gear-s4-and-tab-s4-may-be-introduced-later-than-the-galaxy-note-9

Over the past few days we've heard rumors of the Samsung Gear S4 smartwatch and Galaxy Tab S4 tablet launching alongside the Galaxy Note 9, but a new rumor suggests they'll actually land a little later than Samsung's next phablet.

According to SamsungMobile.News on Twitter, both of the two new products will launch after the Galaxy Note 9 and will probably appear at IFA 2018.