A continuity exists from Kamen Rider Ex-Aid: True Ending. Parado gets angry at Kamen Rider Build who had took Kamen Rider Ex-Aid's Element. Parado chases him and...
Heisei Generations FINAL is closely connected to the story of Kamen Rider Build TV Series. The hints that will connect to the movie will be slowly shown in the TV Series
It is mostly related to the Truth & the Influence of Takumi Katsuragi's Murder Case. It will also have relation with Takumi Katsuragi being a Scientist
The world where both Kamen Rider Build's World with Sky Wall and Kamen Rider Ex-Aid's World without Sky Wall exists. Just how is it possible? Could it be Decade's Fault? or Could it be Game World? The answer to that will also be hinted in the TV Series.