Only way they could probably go is the option file route PES did.
I can't see them bothering to implement this - especially if it's a "street football" style game. It seems like a lot of effort for the sake of old-school players (who I think would be the only ones who'd be bothered to do it, but then it doesn't sound like it'll attract many old-school gamers).
Also, if you're (rightly) worried about the legal side of it, surely you wouldn't take any risks (for the sake of very few dedicated people).
Sidebar, speaking of "old-school players" - the ESA (Entertainment Software Association) is reporting (as of the end of 2025), the average gamer age is 41. That really shocked me, but it also made me wonder; why is the focus in football games always the much, much younger gamer (as can be evidenced not just by the trigger-shooter puddle-depth gameplay, but the marketing efforts)?
I guess the answer is that if you overlaid this data with where the money comes from (particularly microtransactions), the youngest group would probably be double that of any other group.
Either way, it shows there is a market that's desperately untapped at the moment (you could argue 30+ year old gamers may also want the floaty "fun" arcade gameplay we have now in FC, which is the only serious soccer game available - let's be honest - but I'd argue that the majority will have all played PES at some point and be wondering where that grounded, tough, grindy and seemingly infinitely variable PES gameplay has gone).