From one mammoth movie franchise to another?

According to IESB claims, Gary Oldman has joined the cast of Iron Man 2.

Oldman is rumored to have been spotted on the set of the sequel this week, as the website reports:

"We don't have any character confirmation, but we are hearing he could possibly be Howard Stark, father to Tony, previously rumored to be played by Tim Robbins. But that role is also rumored to be the one filled by Mad Men's John Slattery."

Yesterday, the same source confirmed that Garry Shandling had landed a role in Iron Man 2.