I also have few ideas about new heroes, but idk if they are going to implemet the.
Shadow - teleporter
Passive - after you press Q you turn into smoke, but not like the bangalore one, the player turning into smoke.
Ulti - Can teleport to certain location, but not longer than 15-30meters and smoke animation appears after you teleport and where you teleport same smoke, but just a tiny but, like the wraith one.
Hunter - master mind
Passive - Release trap that capture the player and the player is unable to move for 2 sec, tho this might work only in tight areas and can be disabled like gas trap.
Ulti - Slow down time for short amount like 3 to 4 sec and players move slowly, but this appears only on the player screen.
Crawler - climber
Passive - allows the player to climb and jump at lot higher for certain amout of time.
Ulti - can create an object like metal plate or something and can be used to step on it or just to hang on it.
Chameleon - shapeshifter
Passive - merges with the surroundings, like there are a lot of videos where people are painted like the surroundings and its really hard to notice them.
Ulti - Can replicate the other player ability, but only the one that was killed by him.
Thats all i got, excuse me for my lame english 🙂