>>26563390They could have easily pushed back the event for later on, well after the Celebi movie even came out.
Not like the movies and series ever fucking acknowledge each other. Besides the first.
Failing all that, they could have changed the events entirely. Use the GS ball for something else, instead of dropping it and NEVER MENTIONING IT EVER AGAIN. It wouldn't have been the first time the anime veered far off from the games. They made a conscious choice to go nowhere with it instead of actually doing something. Nothing ever happens in the anime.
Also 4ever was a fucking terrible movie.