it would be cool to see street fighter characters like juri han, chun li, cammy etc. and overwatch characters like juno, kiriko, dva, widowmaker etc. also dead or alive characters like marie rose, honoka, ayane, kasumi etc. in future updates. it will obviously take a while but i think the players of your game would all love to see these characters appear in the game as well

The best chance to have all those character in game is by joining the discord and publish something in #chara-suggest
In that way, people can react to a character, and then, the most liked one will be in game.
Discord:https://discord.com/invite/hYFcRPfEcK
(But thank for suggestion in any case ^^)