I have too many ideas but I still would have preferred to take my audience opinion.
Next world :-
1) Genshin Impact (Difficulty - Ex)
2) Naruto ( Difficulty - SSS)
3) One Piece ( Difficulty - Ex)
4) Marvel ( Difficulty - S)
5) Pokemon ( Difficulty - S)
6) Demon Slayer ( Difficulty - A)
6) Solo Leveling ( Difficulty - Ex+)
7) Eminence in Shadow - (Ex++)
Ex is due to God class enemy. As the number of enemies which are in god class increase (+) sign increase.
Marvel world already have many superheroes Mc will just need to gain benefits instead to going against every villain.
Show some support and vote..... Choose some warrior ladies that can join harem. And please share your opinion. ✌❤❤