There wouldn't be an acceleration of dead money if he were to be traded now. There is a post June 1 trade clause where the acceleration takes place the following year.
But even then it's $16 million now and $16 million next year.
The Saints simply don't have the cap space to trade MT13. I hope that a 1500 yard, 100 catch, 10 TD season when MT13 comes back will remind people how dominant a receiver he actually is. Maybe then they will forget the annoyance of being unavailable at the beginning of this season.