Oasis is probably my favorite map so far. Especially the map with the cars
I've had a lot of fun playing the brawl and even fooling around the map with my friends in a custom game. We had everyone launch themselves in the air as Mei in that car map (by walling beneath you when a car hits you). We played My Heart Will Go On and it was so dramatic watching the bodies skyrocket and fall while listening to the song
They should make it so that it counts as a kill when you push someone towards the cars and they die.