NO! NO! NO! No more Metallica covers!!!!!!
The world has already seen far too many Metallica covers, and since almost every band in the world practise Metallica songs before they make their own songs, it's just too much, man!!!
It's just like a friend of mine said to my other friends band: "If you're playing a gig with your band and you're gonna play a cover, DON'T choose a Metallica song. They're so worn and used, that it just makes the whole gig look bad."
edit: Just yesterday I bought Ensiferum's single "Tale of Revenge" and the second track on it is a cover of Metallica's "Battery". And, although it sounded pretty good and so on, I was kind of disappointed to see the track on the single.