Rebecca Rubin Film and Media ReporterParamount’s blockbuster “Top Gun: Maverick” is still flying at sky-high altitudes, surpassing $900 million at the global box office.With $901.8 million in the bank, the sequel to Tom Cruise’s 1986 action flick “Top Gun” stands as the year’s second-highest grossing movie worldwide behind Disney’s Marvel adventure “Doctor Strange in the Multiverse of Madness” ($943 million). At this rate, “Maverick” is poised to overtake the crown in the coming weeks.Even without playing in China or Russia, the $1 billion mark looks to be within reach.