I feel that he probably won't find a drive.
That said, rumour had it that Kimi was going to Williams - and he went to Lotus Renault. So I guess the door could still be open for Rubens.
I like Rubens, I really want him to be racing next year. He deserves to be able to choose when his career ends. Not just find himself out of a drive. Plus, IMO, he's better than Maldonado anyway and he's only there because of the sponsor money he takes with him.