This might be silly to say, but I watched Solo Levelling lately and it's got me thinking an SAO/SL game in RPGM (even one that's not hentai/ntr) could actually be quite fun, too. But I guess I'm just a sucker for this game engine. Imagine having to grow stronger and fight your way through the 100 levels of Aincrad, in a traditional RPGM JRPG style! I've started playing the 3d SAO games (starting with Re:Hollow Fragment), and I think their weird complexity wouldn't match the charm of a simple RPGM SAO game.