Is it possible to intergrade fortnite festival (guitar hero) into a custom gamemode?

I have been inspired by the new guitar hero game mode “battle stage” that Epic recently added. It is very fun and addicting. It feels like there are so many possibilities for different game modes.

So I’ve been wondering, is there a way to intergrade the ‘guitar hero’ aspect in UEFN to create a completely different game mode? I am looking to be able to still use the songs and charts epic has created (and use those songs the players have bought in the item shop), but create new kinds of attacks, debuffs, abilities, and style of game mode? (for example, rather than a 16 player FFA, or a 4 person festival jam)

If this is not possible yet, is this on their roadmap? Will this be a possibility in the future?