Mattel's DC Multiverse 6" figures were very quiet across the Toy Fair 2018 coverage. Thank fully there is a superb article at ScienceFiction.com that breaks down the DC Multiverse releases.
The majority of the Multiverse releases are comic book releases. But for film fans take a look at two gems that are movie based in the 6" line. The first is an early unpainted prototype of Penguin from the Batman Returns which looks brilliant. Fast forward to Batman Forever, and there is a Val Kilmer Batman. These bode well for a nice set of classic Batman (and potentially Superman) figures based on the classic movies.