I'm all in. I think it could be great fun addition and as a side product it could motivate managers to train their NT players even beyond 23-26 years (the reasonable way). And they could get some slight merchandise as a revenue when those would be finally pushed out from "A" NT senior teams.
If there would be some sort of regime as for NT/u21. I am for pairing it up with u21 cycle.
Surely not retired players, they don't even getting older many times do the wouldn't have the age if sacked at younger age.