The first trailer has been released for X-Men: Days of Future Past.
X-Men: First Class - New Trailer
If you don't mind the Russian translation, there's a new trailer for X-Men: First Class, with a lot of new footage.
Ant-Man - VFX Profile
fxguide have posted a lengthy article on the VFX from Marvel's latest film, Ant-Man.
Marvel's Agents of S.H.I.E.L.D. - Trailer
The first trailer is out for Agents of S.H.I.E.L.D., a new tv series from Marvel.