If they're going to take the game online...I mean *really* whole-hog online...then there's a wealth of opportunity, if only because they're *not* bound by what can be squashed into a monthly magazine or even into several large books The sky's the limit! So, in no particular order:
**Support for ALL editions of the game. (OK, that one *is* in order; it's first!)
**Adventures covering all levels, all editions.
**Conversion aids for those trying to convert something from any edition to any other.
**Revival and support for out of print setting e.g. Birthright, Mystara.
**Logical sorting of past articles etc. e.g. all the Ecologies in one place.
**Random generation tables for anything that might ever need it - spells, treasure, monsters, anything where the tables are unwieldy enough that a computer can do it better than pen and paper.
**Rulings included where they belong...e.g. if a particular spell has been ruled to work "x" way, that ruling appears with the spell description (they could use M:tG's Gatherer as a working model here). Same for feats, skills, etc.
** [lots of other good ideas posted already by others, above]
And to be really idealistic, include places for input from us the players...our homebrew spells, our redesigned deities, and so on...as a recognition of the living game outside the WotC walls.
Lanefan