Andrew Wiggins, who is dealing with a left quad contusion, is also questionable to play.
The former NBA coach believes the move would give Los Angeles the assets needed to rebuild its entire roster.
The exchange came after the Knicks fell to the Kings, 102-94.
"That means people want to come to that game. It's amazing to hear about the support," Nowitzki said.
After missing the past eight games due to left knee soreness, the center is expected to play Sunday against Indiana.
The Minnesota Timberwolves defeated the Washington Wizards on Saturday despite Karl-Anthony Towns' absence in overtime.
Brandon Ingram's injury situation offered a reminder to LeBron James just how quickly things can change in the NBA.
After the Boston Celtics defeated the Los Angeles Lakers, Kyrie Irving admitted it would be "hard" for LeBron James to miss the playoffs.
A loss to the Boston Celtics marked the Los Angeles Lakers' fifth straight in the NBA.
Towns recorded 40 points and 16 rebounds in the contest, but did not return after leaving the court in his team's overtime victory.