Philly.com reported that Scott Tharp, president of the Ed Snider Youth Hockey Foundation, said Timonen would play in the charity event.
It is unknown if the 39-year-old, who signed a one-year contract on June 13, will be able to play hockey this season.
After experiencing pain in his calf, Timonen was treated in Finland when blood clots were discovered in his lower right leg and in both lungs.
It was the second time Timonen was diagnosed with a blood clot; he developed one in his foot after blocking a shot against Montreal Canadiens defenseman Andrei Markov during the 2008 Stanley Cup Playoffs.
Timonen has spent the past seven seasons with Philadelphia. He had six goals and 29 assists and averaged 20:20 of ice time in 77 games last season.
Philadelphia opens the 2014-15 season on Oct. 8 against the Boston Bruins at TD Garden.
The Flyers signed free-agent defenseman Michael Del Zotto to a one-year contract in an effort to replace Timonen.