That's pretty much where it is, and that's it IMO.
I used to believe they would do a WC4 for the longest time. Hell, i even theorycrafted how they could tie it in directly with an expansion and have a way to bring your "Character" in as a hero unit, ect.
But recent history has changed my opinion on that.
First piece of evidence WC4 won't happen: Battle for Assrot - They're calling that pathetic series of skirmishes "The fourth war". I mean, it's right there in black and white. BfA WAS Warcraft 4.
Second piece of evidence WC4 won't happen: Warcraft III Reforged. Everything from how half-assed it was shat out in the end, to it getting review bombed - it's pretty much guaranteed that working on RTS games isn't in Blizz's future anymore.