I’m not sure what is actually being asked either. I mean, as a summer release, kids had ample time to see the 86 film prior to the release of new episodes of the series in the fall. Even if they hadn’t, the first episode of season 3 recapped the entire film. Not to mention the comic book adaption.
If the original poster was asking “Would season 3 have been better received if everyone had seen the animated film?”, then…not really. Season 3 would still have its drastic status quo change, it still would have focused on new toys, it still would have been saddled with Akom’s piss poor animation. And the film would still have the, quite brutal, deaths of a number of fan favorite characters.
Again, not entirely sure where the point of discussion is here.