What if DC had been bought by Marvel; Dark Avengers

I once read that Marvel had once tried to by DC before DC folded into Warner, mainly due to the reluctance of DC to sell Superman and Batman? But, what if? What would have a DC-Marvel merger have looked like?

What would it have done to the Dark Avengers?

The team of dark counterparts to Marvel's heroes, such as Thor and the Hulk, what would happen if dark counterparts of the DC heroes appear as well?

Seeking to discredit heroes, Lex Luthor forms his own team of lookalikes to several of the major heroes, aiming to discredit the names of those who oppose him, permanently

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