HELL, yeah, I'd preorder MoM2 -- sight unseen!!
Heck, I'm bloody tempted to offer to INVEST in it - even though that'd mean me not eating for a few months.
All I *really* want is:
... slightly updated graphics. Doesn't have to be 3D, just better resolution!
... multiplayer (both hotseat and network)
Everything else is pure extras.

Mind you, for a WISHLIST ...
... Race-specific spells of the various magic types;
... "multi-color" spells - spells which require more than one color spellbooks, like "black/red" or "white/green" or the like;
... bigger maps
... somewhat more control over the features of each map - not just amountof water and strengthof magic, but: number of nodes, how cold/arid/etc the world is, wether the land is a single landmass, a few continents, or many small islands; that sort of thing!
... more maps - multilevel within the same Plane would work, better IMO than more planes; Arcanus and Myrror worked as-is. Perhaps, and this is a bit of a BIG maybe, little demi-plane pockets connecting Arcanus Towers to Myrror Towers, rather than direct connections between the two ...?
... an Avatar level hero for EACH of the colors of magic, instead of just for White
... less automatic superiority for Heroes over military Units ... I'm SICK of the Chosen wading through army after army with hardly a scratch.
... the ability to make "lesser artifacts" in quantity, and distribute them to your troops - which might address the troop/hero imbalance. And, I do mean more than just magic/mithril/adamantine weapons. Why not make the weapons seperately from the troops ...? And the armor, for that matter.