According to a report in the latest Wrestling Observer Newsletter, The Lucha Brothers of Rey Fenix and Pentagon Jr are said to be signing an exclusive contract with AEW soon which would allow them to work regular dates with AAA. They’ve been under a Lucha Underground contract so AEW has not been able to sign them. WWE’s also reportedly shown interest.
Regarding their status with other promotions, they’re believed to be booked with IMPACT through Slammiversary. MLW seems to have written them off, (see here) and THE CRASH Lucha Libre promotion had them drop the Tag Team Championship on May 24th.