Yes, i do agree, it would be nice if we get Cavern of Time dungeons and/or raids to show things that were not shown in game.
-Like the Horde getting a dungeon where the Infinite Dragonflight tries to kill Varian and Anduin and we have to stop them (to prevail the timeline) and we see when Varian dies (the first time) and get ressurected by Anduin.
-And the Alliance get a dungeon where the infinite Dragonflight tries to kill Sylvanas and her Valkyr (Tries to kill Sylvanas on her way to Icecrown citadel, and the Valkyr in Icecrown citadel to make sure Sylvanas cannot get ressurected by them).
-A Dungeon where the Dragonflight joins up with the remaining Nathzerim and try to stop the destruction of their world by Illidan (We all get transformed into Demon Hunters -looks only)
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It would be great to get the moment when Jaina helped the Horde kill his father, and have the Dragonflight always taunt the Alliance saying that "They could change the past", "They could save Theramore, they could save so many souls"