Initial filming is currently underway on Marvel’s highly anticipated sequel The Avengers: Age of Ultron, and the production is so large that some of the actors aren’t even showing up until two months into production.  That’s what Chris Hemsworth revealed this weekend while at Wizard World Comic-Con, where he briefly discussed writer/director Joss Whedon’s follow-up.  While the actor obviously didn’t reveal any plot specifics—or anything of substance, really—he offered up some obvious yet still enticing nuggets about the superhero team-up and talked a bit about his shooting schedule.  Read his comments after the jump.

While speaking at Wizard World Comic-Con in Sacramento (via CBM), Hemsworth spoke briefly about Age of Ultron:

“Everything in [Age of Ultron] is ramped up, though. It kind of blew me away reading [the script]. I don't know how Joss [Whedon] does it, but everyone has gone up another notch and the whole thing is bigger and more exciting and crazier. Yeah, he's a genius.”

The actor also talked a bit about reuniting with his castmates, revealing his shooting schedule in the process:

“I'm really excited to start Avengers 2 in 2 months and get back on set. We're going to meet in London and shoot there for 4 months, so I'm excited to get back together with everyone and catch up.”

We know that photography began in South Africa a couple of weeks ago and that the production will also be moving to Italy, the U.S., and South Korea in addition to other as-yet-undisclosed locations, but London will provide the base for the bulk of filming.  The Avengers: Age of Ultron opens in theaters May 1, 2015.