No, it means that if you preorder #2 or buy it within its first week of sale, you get certain goodies in #1 if you already own #1, as far as I understand.
Normally,#1 had one world map with all its factions (The Old World), and #2 has a completely different world map ("The New World" - Ulthuan, Naggaroth, Lustria and the Southlands, iirc), these two do not overlap unless you own both games, then they combine the maps into one giant world map.