Idea for new Hearthstone gamemode!

This idea is inspired by two headed giant in Magic: a gamemode where there are two teams of two heroes fighting!!

Now there are two ways this could be done: a team of two players, or one player plays with two decks at once! The former is obviously much more social and I think more fun, but the latter has a bigger depth of strategy and more control for players

Both heroes could share a larger life total, or both have seperate life totals! If they were seperate, then dropping one total to 0 would eliminate that player which I feel would be problematic to balance properly...

As for the board, both players would share a board, but control only their minions. The board would be a bit larger (maybe 10-12 spaces?) and spells like savage roar would still probably affect the whole board

This certainly opens interesting design space, I'd love to hear what everyone thought of it as a hearthstone concept :D