At the beginning of the movie, Xavi Font gives Freddie Mercury a gift for his birthday, a shoes designed by himself that, at the ending of the movie, they appear as part of the music video Queen: I'm Going Slightly Mad (1991) that Font is watching on TV. It happened actually: Mercury and Font not only met in Ibiza, but Mercury felt attracted to Font by his fashion designs and his extravagant personality.
In the prologue, set in 1987, it's explain that the band were invited to dance in a party organized to Freddie Mercury to celebrate his birthday in Ibiza. This is historically accurate: Mercury was diagnosed AIDS a little time previous to his birthday, and he decided to make a large celebration to take advantage the time he left still alive.
Along the movie it can be seen so much archive footage of Locomía apparitions in TV shows. These footage is for real, replacing the real-life band members with the movie actors using CGI.
The Spain movie premiere was controversial: founding member Luis Font wasn't invited to the event, and in the media he accused his older brother Xavier Font to be a emotional terrorist and an abusive person with a terrible behavior not only during the years of the band but later, claiming that he was the responsible who prevented him to succeed in music.