The three will showcase Reebok-CCM equipment including the RBZ skate and RBZ Stage 2 stick.
The formal announcement was expected Thursday night at the Toronto airport hotel where the top prospects are staying for this week's NHL combine.
Jones, a defenceman from Frisco, Tex., who plays for the Portland Winterhawks, is ranked No. 1 in the Central Scouting rankings. The son of former NBAer Popeye Jones, he had 14 goals and 42 assists in the WHL this season.
MacKinnon and Drouin are teammates on the Memorial Cup champion Halifax Mooseheads, with Central Scouting ranking MacKinnon No. 2 and Drouin No. 3.
MacKinnon, a centre from Cole Harbour, N.S., had 32 goals and 43 assists in the QMJHL this season. Drouin, a left-winger from Halifax, collected 41 goals and 64 assists.