Bayern is a good move for Sane if it definitely comes off. He needs regular football after being out for so long, it’s probably good for him to be in his home country, I suppose playing in Germany gives him a better chance to get in the national team too.
Yes, going back to his country will surely boost his chances of getting to the national team, plus, it bayern, it makes it more easier for him to make it. He was so hurt having to miss out in the last world Cup, am sure he would take the chance to go back home with both hands. Good deal for all parties.