Bryan Singer is the latest filmmaker to utilize Twitter as a means to share the day-to-day life on a film set. The director is in the midst of pre-production on the highly anticipated prequel-sequel mash-up X-Men: Days of Future Past for Marvel and 20th Century Fox. Today, he has given us another look at the soundstages currently being constructed in Montreal. Here, we see Cerebro as its built from the ground up. The director also teases his presence at SDCC 2013. Will we see the first footage in San Diego this year? That's quite possible.