Antropov, 33, tallied six goals and 12 assists for 18 points, along with a plus-6 rating, in 40 games with the Winnipeg Jets last season. He played in 26 games with Astana of the KHL during the NHL lockout and registered three goals and 14 assists for 17 points.
Antropov's European agent Shumi Babaev confirmed to Russian media outlet Sport-Express that his client was interested in returning to the KHL, indicating there was "interest from several clubs."
"Nikolai is currently training in North America, waiting for the right moment to fly to his new club and sign a contract," Babaev said, prior to Antropov agreeing to his two-year deal with Astana.
Antropov, a 13-year NHL veteran, has played in 788 career NHL regular-season games with the Toronto Maple Leafs, New York Rangers and Atlanta Thrashers/Jets, and has accumulated 193 goals and 272 assists for 465 points.
His best offensive season game in 2009-10 with the Thrashers when he picked up 24 goals and a career-higher 43 assists for a career-high 67 points.
The native of Kazakhstan was originally drafted 10th overall by the Maple Leafs in the 1998 NHL Entry Draft.
Meanwhile, the Jets have lost another player, as forward Aaron Gagnon has signed a two-year contract with HV71 of the Swedish Hockey League.
Gagnon, 27, registered three goals and a plus-2 rating in 10 games with the Jets last season.