Closest thing they did was a WarCraft 3 remake a few years ago, but it wasn't really well received. I think mostly because of reasons other than the actual remake, since they forced the original game to be part of the new launcher and altered the original game.
I wouldn't expect a new WarCraft RTS anytime soon though. They got 3 expansions planned for WoW, so it'd be hard to fit in an RTS that would take place around the same story/theme without making it an alternate timeline kind of thing.
Yeah the cinematic wow team is amazing. They haven't been as good lately, mainly because the main wow storyline now is kinda garbage, but go watch the Warbringers: Jaina cinematic, which came out for the BFA launch. Same art style, hits hard.