The ABC drama premieres Sept. 23
Network plans two-night premiere for new drama "Forever," and two-part "DWTS" results finale
Oscar-qualifying short-film festival will also showcase shorts with NIck Offerman, Tony Hale, Alex Karpovsky, Sarah Paulson and Sophia Loren
"Marvel's Agent Carter" stars Hayley Atwell from "Captain America"
Eric Bilitch is directing the indie movie, which co-stars Nancy Travis and Hunter Cope
"We didn't blow up the premise. We just moved it a little sideways," executive producer Craig Shapiro said