Increased interactivity with dead champions (within reason)
In this cinematic, Tibbers is eaten by Baron. Why should it stop there? Baron Nasher is a huge monster with a HUGE appetite. Nothing would make me happier than playing Syndra and bursting down a Teemo, then tossing his body into the Baron pit to be swallowed whole. Imagine the irony when a Nunu/Willump or a Cho'Gath dies after a Baron rush misplay, only to be consumed and feasted upon for once.
Throwing a Warwick to the wolves would also be a satisfying end. Or everyone's favorite yordle being crushed by the ancient golem.