I'm happy for Jadon Sancho's decision honestly. Because he had no future at Manchester United with Erik ten Hag because of the problems between them. It is great to see him back at Dortmund as he was playing really amazing there before. Terzic must also be happy to have him. Their season in the Bundesliga hasn't been going on well for them.
Sancho could really make a good impact on the performance of the team here. With his contribution I hope to see Dortmund back in top four at some point. This would save Terzic from the threat of getting sacked at the same time.

Sancho's move to Dortmund has my support! His Manchester United career wasnt great, was it? Ten Hag and Sancho, like oil and water, didnt mix. Back at Dortmund, he feels at home. Dortmund needs his energy and dynamic play. Seriously, he's 23! This is a potential goldmine. Terzic must be thrilled to have him back. I think Sancho will spark Dortmund's revival. Top four? Not just possible, but likely. It may also save Terzic from the chop. Dortmund fans have exciting days ahead.
There are many people were feeling disappointed with caused by dortmund was picking useless player from manchester united which was unacceptable. There's no guarantee going baclk to the dortmund will help him to perform better than before.
Dortmund was taking the big risk by signing him back again after jadon had very bad years on manchester united. This is another challenge for him. Im not really sure terzic will put a lot of hope for him. Im not also expecting jadon to perform as good as when he was still at the dortmund.
Glad to see that dortmund was still appreaciating him by trying to sign him back again to the club but the competition in the dortmund becomes even stricter than before and this is the main problem needs to be faced by jadon.
He needs to compete with other player to get a spot in the main squad of dortmund. Dortmund is still struggling at this moment and jadon can take it as an opportunity to show his worthiness for the club that signed him again.