Should I accept this trade?

No. Fielder and Morneau are both great, with Morneau a bit of an edge. Catcher wise, Soto had a very good season last year, and while Mauer is the best in the game, Soto is not exactly a bad option. Here is the deal breaker: Peavy for Verlander is not good for you at all. Verlander had a terrible season last year, and Peavy is a true ace. Peavy is the better pitcher by far. Deal with Fielder and Soto, you'll be sorry if you accept this.