To be honest, I wouldn't be surprised if that's Epic's endgoal. But the music industry is a gargantuan behemoth with paper thin profit margins, and Epic is already struggling enough battling the mobile market (a much more lucrative market where the fight makes sense).

I can't see any significant push like that happening for a decade+. This and the harmonix aquisition are probably just the foot in the door needed for those plans should they want to push one day.

I don't see why that's the case? Just give Bandcamp artists the tools to set their own royalty structure (In the same way they price their own songs) and integrate this marketplace into Unreal or wherever else. Self published artists get a source of revenue typically reserved for labels and Bandcamp gets the cut instead of someone else.