This is only natural based on what I've been playing lately, but the way Aonuma talked about redefining the Zelda concepts made me think of a Zelda Dark Souls style game. Obviously a direct carbon copy probably wouldn't happen (they'll never make a Zelda game that hard), but the posited ideas of multiplayer and less linear dungeon progress give me this idea of Link in an open world similar to Lordran. If they could incorporate multiplayer in a similar way to Demon's/Dark, it wouldn't ruin the single player aspect people generally seem to want from the series but would also be something that redefines Zelda.
This will never happen but I can dream.
Makes me think of the original LoZ