Marvel Entertainment International President Simon Philips recently indicated in an interview that Pepper Potts will appear in a suit of her own for Iron Man 3. The original reports out of Brazil have been apparently been removed at the request of Disney, a move that likely signals this being close to the truth.
The report also stated that Tony Stark will have an underground Hall of Armors with over a dozen designs (many based upon classic Iron Man inceptions from the comics). There is precedent from the comics for Potts to be in armor, having assumed the mantel of Rescue with her own metallic suit.
Source: TheMarySue.com