The nether update 1.16.2/snapshot 20w28a ideas

Since we are in the nether update, they could add a small chance of the wither skeleton spawning in the soul sand valley biome, with a stone / iron sword, they could also put an extremely rare chance of a skeleton horse being born in the middle of the fossil structure. Could you add a new mob, based on a common one, the Zombie, can you add a reddish-colored Zombie with fire resistance ??? and a small chance that he will set you on fire with every attack ??? information: has 20 life points, corresponding to 10 hearts, with the same damage as a Zombie per hit, with each attack has a chance to set the enemy on fire, usually fight with drowned, guardians and elder-guardians, they have a habit to break distorted and crimson doors surrounded by crimson and distorted boards, also has a small chance of attacking piglins, generates in the biome soul sand valley and crimson forests, has the drop of random items, blaze stick, blaze powder, rotten meat, walks a little more slowly than normal zombies and at any cost will attack sea creatures, if it stays in the normal world for a long time, it becomes a husk, and can detect players at a longer distance when the player is wearing turtle shell on his head or the aqua affinity enchantment. And when he dies, he releases particles of fire, his drops spread 1 block away and with a small chance, he sets fire to the place that died.