Will the Expansion include Arenas?
At this time Arenas are not a part of the Expansion set.

Will there be any additions to Acts I-IV, such as new caves or
dungeons?
Although Diablo II: Lord of Destruction will not alter the
terrain of Acts I - IV, it will have both new wilderness and
interior areas in Act V.

Can you expand on the enhancements being made to Acts I-IV?
The two new characters start in Act I, so they will have a whole
game's worth of new skills. For the other character types, there
will be new class-specific items; socketable rare, magic, and
Unique items; new Sets; new Horadric Cube recipes; new Jewels and
Runes; and hundreds of new magic properties that combine to make
thousands of new items.

Will I have to play through the game again to access the new
Expansion Act?
No, you can take your existing character directly to Act V if you
have already defeated Diablo. This is true for each difficulty
level you have completed.

What is the process for entering Act V?
After you kill Diablo, Tyreal will appear and, after setting the
stage for the continuing storyline, will open a Portal for your
character.

How big is Act V in comparison to the rest of the game?
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