THQ is already gearing up for Company of Heroes 2 by offering a wide range of pre-order incentives.
Pre-ordering in general will net you two skins for medium-weight vehicles called German Rotbraun and Soviet Leningrad. Do it through Steam and you'll be naturally rewared through their Tiered Reward Program with goods from Team Fortress 2 and Warhammer 40K: Dawn of War 2. Do it through Origin instead, and you'll get the heavy vehicle skin called Soviet Bryansk Front.
But if color swaps aren't appealing to you (and why would they be?), it's better just to pre-order the title directly through THQ since this unlocks bonus multiplayer maps and admission into "exclusive member's only events."
One step beyond that is the $99 Digital Collector's Edition, which apart from including the original critically acclaimed Company of Heroes and its two expansion packs, essentially includes a season pass to the first three single-player content packs as they become available. It also comes with several more vehicle skins (can't have enough of those...) and a veteran badge adorned to your name.