At the moment, there hasn’t been any official announcement regarding Liga MX being included in FC 26. Licensing agreements like this usually come down to negotiations between EA and the league itself, and until something is finalised, EA won’t confirm anything publicly.
If those negotiations are sealed, then there’s always the possibility that Liga MX could return either through a future update during the FC 26 cycle or in a future installment of the series. For now, the best approach is simply to keep an eye on official EA channels over the coming months, as that’s where any news or updates about new leagues will be shared first.
So while nothing’s confirmed right now, it’s definitely worth watching this space.