I've read plenty of player interviews where they've said representing their country at the World Cup is the highlight of their career. I haven't seen much from Bale over the years to imagine him saying anything different after he retires. So being a few months away from the World Cup, I would think it's his primary focus.
I said he could still play in the US at 35, he's quite capable of it, not that he definitely would still be playing then.