The robots’ red glare, the bombs bursting in air, gave proof through this Independence Day weekend that the Transformers franchise still had muscle to spare. Transformers: Dark of the Moon, third in Michael Bay’s HASBRO-Spielberg series of epic-length, fortissimo toy commercials, earned $97.4 million during the standard three-day weekend, and $116.4 million for the four-day holiday frame, according to early studio estimates.