Before I put down a proposal, I will say that I doubt Seguin leaves Dallas, but I do believe he plays on three teams for low money before retiring like NYR, Toronto and a team I least expect for him to sign with but for now I'll just say Columbus.
Hypothetically speaking, any team I see interested in bringing in Tyler Seguin, I would probably think Calgary, St. Louis, Philadelphia, NYR or Columbus would be super interested in not only wanting him but also need him, heck maybe even Vegas. But for now I'll say the Flames because they're heading down a road of contention, but we'll just pretend they signed Tkachuk to a good contract extension.
Calgary:
Tyler Seguin
Dallas:
1st 2019
1st 2020
2nd 2019
2nd 2020
Sam Bennett
Mikael Frolik
Michael Stone
Gaudreau-Monahan-Neal
Tkachuk-Seguin-Lindholm
Winnipeg might bring him in as a rental because the Jets not only have the assets to acquire him, but they're interested in contending and Seguin walking away from Winnipeg won't even hurt.