Recent study based on supercomputer simulations (Unfortunately due to secrecy of the facility i may not name the place, hardware used, or the algorithm) have shows two scenarios for improving ARAM popularity among players:
a) a series of events, let's call them ARAM-ARAMA with aram based missions. Estimated influx of players for duration of event - 30%
b) using Butcher's Bridge map skin - estimated influx of players - 0. Servers shutdown due to severe overload. Required backup servers to fill in ARAM overpopulation.