Several downtown Bend restaurants are under new ownership. Chuck Arnold with the Downtown Bend Business Association says people will have some different choices.   We're got some changes afoot, about Mars Bistro is changing its name and its menu. Giuseppe’s is going to be Caldera Grill, new owners on Bond and Decoy on Bond Street is now changed to Bond Street Grill. There are also some new lingerie and upscale consignment shops opening up downtown.