Neuer was ruled out for the rest of the season after undergoing surgery on a broken bone following a skiing accident.
Bayern Munich's four-game winless run -- their longest in the Bundesliga in 20 years -- has soured the mood among club bosses and piled pressure on coach Julian Nagelsmann to quickly turn things around.
Pavard will miss this weekend's opening game of the Bundesliga season at Borussia Moenchengladbach with an injury.
Haaland has scored 37 goals in 38 games for Dortmund this season in all competitions.
Despite missing a month with injury, Haaland, 20, has managed 17 league goals this season, but admits there is "a lot" he can learn from Lewandowski
Nagelsmann is already the toast of European coaching after becoming the youngest manager to reach the Champions League semi-finals.