Earlier quoted context omitted.
To add, I'm not sure what legal basis there is for "you're charging too much". My only guess is filing against Apple and Google jointly for being a duopoly, but Epic has made it extremely hard to do something like this because of their existing jury trial against Google which gives a lot of concessions to third-party app stores in terms of functionality.
"You're charging too much" seems unlikely to be the actual argument presented though. Something along the lines of the scare message, still not actually allowing it to be handled via in app flow like a first party payment, and intentionally making a 3rd party choice potentially impossible to compete vs a 1st party choice by arguably hiding part of the processing fee margin in the overall fee would be the kinds of arg…
Epic's goal is to pay lower platform fees to Apple and Google, presumably lower than the (30%?) platform fees they pay to Nintendo.