Hearthstone's latest expansion "Return to Gadgetzan Vol. 3" has just been released, following the rotation of "Gadgetzan Electrical Boogaloo", "Dankmoon Fairy Tales" and "Who Patched Patches the Pirate?" into the game mode (which was introduced in 2019) "Wildwoods" which is basically a Wilder Wild. Expansions now rotate from Wild into Wildwoods.

Some of the new keywords thus far that you may consider knowing are the following:
"If you played an Elemental last turn..." is now called Elemeddling.
"At the start/end of your turn" are now called Start/End of Turn respectively.
"Cast this again" has been renamed to Recast.
"Can't be targeted by spells or Hero Powers" remains roughly the same, only that it now is bold.

With Gadgetzan Vol. 3, it is expected for Elemental Murloc Hunter to rise again while its only real counter deck, Taunt Beast Mage has been nerfed to the ground with the rotation of Shatter (which actually got added to Standard in 2019) to Wildwoods.

Blizzard hasn't addressed the reason on why Shaman has yet to receive literally any cards since the Dark Ages of Hagatha the Witch in 2018... we do not speak of these times.

As of Warlock, the rotation of the class to Wild has really helped on keeping the meta stale.

May you have any questions to ask about the future of this game, hesitate not, I'll answer as soon as I get the chance. I must get going now since it actually is against Activision's terms of use to publically share such information to the past. Blizzard jail is no joke anymore...