New ADC idea
I think it would be cool to incorporate an adc with a pet. A pet with AI but able to be controlled, similar to tibbers. I'm imagining a huntress/Hunter with a faithful, furocious hound dog. The passive would be that this champion (we'll call him/her Z) has a pet that follows and will fight for him or her doing 60% of Z's attack damage (autoattacks). If the pet is slain the passive goes on CD for 20 seconds and Z loses 25% health. The pet will respawn at base and seek out Z. So for the main abilities there will not be any scaling abilities (this champions power is in the auto attacks of both Z and her pet; essientlly two adcs). So for q champ Z gains 40% attack speed, this bonus is doubled when the pet is within 200 units (applies to Z and pet). W allows Z to join his/her spirit to his/her pet and they become one, significantly increasing health and move speed but total ad is reduced. E commands your pet to let out a vicious roar fearing surrounding enemies for a short duration. R after a brief animation of Z feeding her pet; it grows in size, deals a burn DOT, and instills fear in Zs foes drastically reducing thier attack speed. So there are probably much better ability ideas but this is my stab at an adc with a sidekick. My thoughts are the champ is extremely relient on the dog (or whatever creature it may be) and loses a lot of power if it is gone. Because you have something that deals dmg for you and can tank for you the abilities can't have direct dmg attached to them. The adc will likely have a small attack range considering the dog can be sent out to attack. This adc will have self peel because she can fear whomever jumps on her and have a ton of attack speed to lifesteal back up. If in danger the move speed on w can get you out of danger with a little bit more health. R is what makes teamfighing possible. The major weakness is no ad scaling abilities and a sever reliance on her pet. If trhe pet is sent too far away it will be focused down and Z will take a lot of dmg even if she is far away. If the passive is on cool down (the dog is dead) you cannot take a fight.