I doubt it'll loose money once you factor in the revenue from licence products, which has always been where Star Wars gets it's cash flow. Regardless, the extra expenditure will certainly tighten the margins but don't go thinking that reshooting most of the movie means the budget instantly doubles. The post-production costs shouldn't be significantly affected, nor the marketing, props, costumes, sets or basically anything that's not paying for the cameras to roll with people standing in front of them for a few weeks.