Will a rom-com set in New York charm enough voters? Perhaps it will be a vampire musical set on the opposite coast of America. Can a send-up of the movie “Titanic” float to the top? Or even a send-up of golden-era Broadway musicals themselves? It's Tony Award nomination time, and entry into the top crown category — best new musical — is up for grabs in a year with 30 shows eligible but no strong consensus on best new musicals or plays. Even though there are no such things as locks, it's very likely that John Lithgow and Joshua Henry will hear their names called. Uzo Aduba and Darren Criss on Tuesday will announce the nominees in 26 categories, setting off a month of campaigning that results in trophies that could make or break a show. The nominations will be revealed at 8:30 a.m. EDT live on “CBS Mornings” and then at 9 a.m. EDT live on the Tony Awards YouTube Page.…