Elton John has teased an unlikely collaboration with Metallica, after the singer joined forces with the metal icons during the latest coronavirus lockdown.It is yet to be revealed if the two acts teamed up to record a new song, but Elton briefly discussed the team-up during a recent chat with SG Lewis on ‘Rocket Hour‘, his Apple Music show.“I’ve just done something with Metallica. During this lockdown period. I’ve been working with Gorillaz and people like that,” Elton said.