Here comes the evil super-robot Ultron, voiced by James Spader in serial-killer mode. Apparently this story introduces Quicksilver and Scarlet Witch, despite their dad (Magneto) being part of a separate movie continuity that Marvel Studios doesn’t have rights to... and that continuity having already used the Quicksilver character.

The CGI robot is looking pretty dodgy. There really isn't an excuse for that in such a major production nowadays.