Yes my system will run Diablo 3. Not sure if yours will? Then check out the link I provided at the bottom of the page.
Yes, Diablo is in Diablo 3.
Yes at high settings to
Yes at high settings to
No. There are Diablo 3 teaser videos on the Blizzard website.
Yes it can. But it may be choppy during co-op and if there is rain or snow.
Right-click it, properties, "C:\Program Files\Diablo II\Diablo II.exe" -w <- the target
Mephisto is mentioned, but does not appear 'in person' during Diablo 3.
Diablo 3 is out now, it was released on the 15th of May 2012.
While you can run Diablo III through WINE (a.k.a Wine Is Not an Emulator), you may not want to. There has been a recent story about people getting banned for running Diablo III this way.
Yes it should be able to run the game. I linked to a review below.
No, there is no pirate class in Diablo 3. If you mean to pirate the game, you cannot do that either.