I think it would be suicide to come out with a $50,000+ SUV before getting its brand image established. Look at Hyundai and Kia. They introduced their 10 year, 100,000 mile warranty (which Mitsubishi already has, but doesn't tell anyone about) to quash consumers' fears of reliability. They started making more refined, better cars, spent a bunch of money marketing their image, and suddenly people stopped thinking all they made was the Excel. Eventually, they worked their way up to the Genesis and Equuis, which could cost upwards of $80,000 USD. Now, they've spun off the high-end to its own brand. But had Hyundai decided to offer a $60,000 model before consumers trusted the brand, I would be the farm that it would've failed big time.
Like MrGalantguy says, they need to solidify their brand image to the mass market. Decide what they want to stand for, spend the money to market it, and get people into dealers. If they can do that (along with offering up appealing product), then they'd have a recipe for success in my not-so-expert opinion. I know it'll be way, way, way harder than it sounds.