New Mechanic Idea: Marking
Was curious what other people thought about this. What if there was a bounty-hunter champion that could "Mark" opponents anywhere on the map. The mark wouldn't do anything, but would basically be a "you're next" mechanic. It might allow the champion to ult that person, do more damage, or get more gold if they kill them.
The mark could reset every time the champion dies and/or it times out. It could also possibly give the person marked more gold if they kill the bounty-hunter instead.
Personally I think it would be a fun idea for both sides since you know they are going to go after you and because of it you can play accordingly and possibly get a little bonus if you survive.
P.S. The champion could be a jungle champ which would allow for optimal marks. You see the mark go over your head in lane and can go, "Oh crap! He is coming after me, better play passive,"