The clock is ticking on Avengers: Age of Ultron. With only about 3 months until the premiere "“ release date May 1st, 2015 "“ I guess a quick recap is in order. See the essentials of Avengers 2 to jog your memory about the upcoming sequel.

1. Ultron, not the first villain considered for Avengers 2

Initially, the role of the antagonist was supposed to be played by Thanos. However, in Joss Whedon's words, "Thanos is not out of the mix, but Thanos was never meant to be the next villain – he’s always been the overlord of villainy and darkness".

2. Other villains might make an appearance

While Ultron is the lead antagonist, Loki and Thanos might make an appearance. All trailers released so far feature neither Loki nor Thanos. But keep an open mind and expect some surprises.