Not sure this is the right place to post this, but there's been a fair bit of discussion about Calgary retaining on Tanev in a later trade and also several times it has been mentioned that the Canucks are said to be in on Tanev, so along that line of thinking ...
The Canucks (as the Leafs) are pretty much capped out. Once Soucy returns they won't have room to take on Tanev's contract without sending a roughly equivalent amount of cap back to the Flames.
Now if approaching the deadline the Flames decide they are essentially out of the running for a playoff spot this season, then the Canucks may be in a good position. Tanev is of course a RHD on an expiring contract. The Canucks just happen to have a highly paid RHD on an expiring contract, who actually makes more than Tanev. He isn't as highly regarded, but if Calgary is trading Tanev anyway for what they can get, they can in fact trade Tanev for Tyler Myers + whatever Conroy and Allvin decide is appropriate to balance the value on the two sides of the trade, if indeed they can come to agreement.
Calgary would get a replacement veteran RHD for the remainder of the season, but only for the balance of the season. He wouldn't hurt their long-term cap situation at all. He'd be a downgrade from Tanev, but if the Flames are trading Tanev anyway, this would permit them to do so without retention and would give them a veteran RHD that can capably play at an NHL level so long as he isn't put in a position where he feels it is necessary to do too much. If there was any retention in the deal it would probably be the Canucks to balance out the difference between the contracts of Myers and Tanev for the short time left in the 2023-24 regular season.
This may not work if the Flames are still realistically in the playoff hunt approaching the deadline nor if the Canucks are so happy with Myers at that time that they don't want to change the team chemistry by exchanging him for Tanev.
While such a deal may work for the Canucks any time, I can't see Conroy doing it unless the Flames playoff chances for this season get really low.