I haven’t seen Age of Ultron yet (yeah I know…), but Zoic Studios in Vancouver worked on several of the VFX sequences for the film. While they used Maya as the host application, based on what I am reading in this article there really isn’t much you wouldn’t be able to do on some of these shots using LightWave with a bit of work and a fair amount of calculation horse power. http://www.realflow.com/product/production/casestudies/40/