In early 2021, the somber news from the cruise sector continued. For some cruise brands, their own version of “lockdowns” will have spanned an entire year. By late January, 2021, Carnival and others were hesitantly pegging their restarts for April/May 2021, and for some markets, late summer, under a Conditional Sail Order promulgated late last year by the Centers for Disease Control and Prevention (CDC).What else to do but look ahead?In preliminary earnings guidance, Carnival Corporation (NYSE: CCL)…