Dollar Tree, Family Dollar Merge, Coach & Herbalife Earnings, Jim's Marathon

It's yet another Merger Monday, with The Dollar Tree striking a deal to buy Family Dollar, creating a union of discount retailers with a presence throughout North America and sales of more than $18 billion annually. Carl Icahn had pursued Family Dollar, trying to shake the company's management up and pushing for a buyout, and the premium on this deal at more than 20% marks a big win for investors. Plus, we'll see new data coming out to start the week and earnings from Coach, Herbalife, Hertz, Radio Shack and Opentable.com. And Jim Cramer has an Action Alert Pick he says will strike black gold.¿