It seems like Marvel has a thing for the cop thriller End of Watch, we previously heard that Michael Pena might take a role in Ant-Man. Now, LatinoReview tweeted that actress Natalie Martinez (Death Race, Broken City) could take an unnamed part in Avengers: Age of Ultron. Martinez played Pena's wife in Watch, which might be the connection.
There are plenty of roles she could end up playing, Betty Ross is one that could be added to beef-up Mark Ruffalo's Banner scenes (it's rumored Bruce/Hulk will have a bigger part). Plus, a ton of other characters yet to be introduced in the MCU.