What would have otherwise been an ordinary league match has become an emotional encounter for the new Wolfsburg sports director as well as playmaker Diego and central defender Naldo, who won league and Cup titles at the Weser Stadium.
They were all once hailed as Bremen heroes with Allofs spending 13 years as the team's sports director before signing for Wolfsburg last week after the sacking of coach and manager Felix Magath.
"Sometimes football is strange," said Naldo, who scored his season's first goal with a thundering free-kick against Hoffenheim last week.
"It will be very emotional. I played with Diego there for three years and now we are together at Wolfsburg and now Klaus Allofs is here as well," he told the Bremen website in an interview.
"But for them it is also a difficult game. I talked to Diego about it who already knows the feeling."
Wolfsburg have bounced back since Magath's departure with three wins in four games to lift themselves off the bottom, with Kostner staking a claim for a permanent position.
His counterpart Thomas Schaaf shrugged off Allofs' departure with a win over Fortuna Dusseldorf for their third victory in five games.
"I have not talked to the coach about it. We still have a couple of days and we will decide on Friday," he told reporters.
