If they determine that it provides the A321NEO access to X thousands extra runways worldwide, it will be standard equipment.
Two aircraft that are slightly heavier than the 97 tonnes LR A321NEO, the TU-154M at 100 tonnes and the TU-204 at 103 tonnes, have 6 and 4 wheel MLG bogies respectively. The 727-200 Advanced, at 95 tonnes had 2 wheel bogies but nose wheel brakes.
A bit lighter is the 737-900ER at 85 tonnes
http://www.pprune.org/tech-log/48727...rformance.html