Unlikely. If winning more than 5 was anything other than extremely difficult, it would have been done more than once. Remember Indurain? He was as dominant as you can be, but 5 years is a long time to be the best. When his time was up, it was up, just like many before him. A cyclist's prime seems to be about 5 years, no matter how old they are when the reach it. That's what makes Armstrong's record so amazing. That he seem to still be a near dominant climber after three years of is incredible.
I think Lance's chances of beating Cantador again are very slim, based simply on age, but the chance of somebody else doing it in the next 5 years is very great.
Remember too that the over all result would have been much closer if the two hadn't been team mates. Twice Lance dropped back a bit in mountain top finishes, and of course he never attacked Contador. Both times he finished behind him, he probably wouldn't have if he were on a rival team of Contador. But unless he can somehow rebuild his time trial prowess, he'll never catch him. And time is against him.
If Armstrong believed he had a realistic chance of winning, he would have tried to do so. Contador was going to win, with or without Armstrong. It’s a beter argument that Armstrong would have never made it to the final podium without Contador and their team.
Armstrong will be lucky to finish in the top ten next year. He had a great, great career; but he is finished as a real threat in the TDF.