alot of loyal fans who bought the previous "Aftermath" version thought that was the complete editon, now alot of them are complaining and its surprising Netherealms actually release another pack for this game, totally no warning.
Those loyal fans won't be left behind, as NetherRealm offers a free upgrade. So I'm not sure if the complaint & backlash is warranted.
PS4 owners can access a free upgrade to the PS5 version of their game, at no extra cost.
For those who purchased Aftermath DLC, it'll carry over & upgrade to the PS5 version (Likewise for players with the vanilla base game who didn't buy any DLC characters, they're also able to access the free upgrade to the base PS5 version. Without any playable DLC characters since they didn't buy it).
The only new additional content is Kombat Pack 2, which is optional. Nobody is being forced to buy KP2. The option is simply there for those who wants to buy the 3 new characters.
No free upgrade = People complain (Slightly justified)
Free upgrade = People also complain (Ridiculous & doesn't make sense)