One by one, the grand plans once touted by Super Bowl XLV backers seem to have popped like balloons. First there was the week-long, “mega-bucks” run-up to the February game; it got curtailed by the ice storm. Then there was the seating fiasco. Then the apparent failure of other Super Bowl cities to rush to embrace the SLANT 45 initiative, which was supposed to have been DFW’s Super Bowl legacy for all times. Now, even the host committee’s regional sports commission idea has been tossed on the scrap heap. Best-laid plans, indeed.