THR is reporting:

With the movie now being rewritten by Abrams and Lawrence Kasdan, sources say producers also are looking to fill a new role: a 40-something military man a la Matt Damon in Elysium.

I have to say, this isn’t really news as he was listed in the first casting call back in June:

Forty something male, fit, military type.

It might appear they are actually actively seeking to fill the role now, however.