This move puts such aspirations firmly on the backburner and, given the depth of midfield talent, leaves them probably out of reach.
"I am very excited to make the move to the Ricoh Arena next season. Wasps are a team that play an exciting brand of rugby and are very ambitious," Fekitoa said. "Hopefully, I can help them push forward and achieve silverware in the next few years."
Fekitoa is currently sidelined after minor knee surgery but his signing represents a boost to Wasps who this week confirmed the dual departures of England loose forward Nathan Hughes, to Pat Lam's Bristol, and Springboks fullback Willie le Roux, who is expected to move to Japan.
Sopoaga will also, no doubt, be pleased to soon welcome a familiar face outside him after battling to spark Wasps this season. Jimmy Gopperth is another member of the Wasps backline.
Wasps rugby director Dai Young said: "Malakai is a world-class player with bags of talent. He's a proven player at the top level, and to bring someone of his calibre to Wasps is a massive coup for the club.
"We are very much looking forward to welcoming him to the Ricoh Arena in the summer, where he will no doubt bring vital experience and know-how which will be of great benefit to some of our younger players."
Fekitoa's departure leaves Toulon with former All Blacks Julian Savea and Liam Messam on their books. Nehe Milner-Skudder is also set to join next season on a three-year deal.
One test All Blacks and Hurricanes centre Matt Proctor last week announced he will be linking with former Hurricanes coach Chris Boyd at Northampton next season.