I would think he could compete for a starters job in New Orleans or Carolina maybe even San Fran too, or settle on being Brady's back-up in TB figuring at some point he is gonna hang it up. I just don't see him being a back up somewhere like AZ, SD, CIN etc with a young QB in place.
I don't see anyone realistically giving Trubisky a shot at starting. Not for a good while.
His best bet is a Dalton type situation where maybe he gets to play some and shine enough for someone to give him a deal next year.
I'm not sure where he would go. Washington signed Fitzmagic knowing Mitch was available. The Saints have Winston and Hill who they like. Jags maybe? But that Org is looking to turn a page, not become laughing stocks.
There are teams that need upgrades but Trubisky isn't an upgrade for any of them.