Who will be the Showstealer or Fan Favourite In Avengers: Age Of Ultron?

I've always wanted to create this thread, since this movie is going to be huge, bombastic and with a lot of characters around. :oldrazz:



This movie will also introduce new characters and include characters we have already seen in the MCU. :drl:



In the first Avengers, the general audience favourites ended up being The Hulk, Loki, Agent Coulson, Black Widow and Iron Man. :woot:



Who will end up being the showstealers and favourite characters for fans and the general audience?