never gonna surpass the rickroll I saw in startcraft 2
someone created a custom map, named it dota 2 beta or some shit like that right?
but in game you could replace the animated gifs to billboards and map decorations and put your own, you could also create a script that zoomed in and removed ui as if you were watcning an ingame cutscene
the second you joined the map, the camera went to cutscene , zoomed into a billboard and started playing rick astleys video, only way you could stop it is by alt+f4
people rick rolled by the hundreds in less than fifteen minutes....epic rickroll..just epic