The Justice League Digital HD (and eventual Blu-Ray/DVD) release contains a number of bonus features that range from being production design walkthroughs to behind the scenes clips of the cast and crew to deleted scenes featuring Henry Cavill’s Superman.
As for the deleted scenes available on the Justice League home release – in one scene, Superman meets Alfred (as was teased in the film’s Comic-Con 2017 trailer).
goal with the DCEU was always getting to Justice League.
Related: Justice League Digital Release Missing Deleted Scenes?