Asmodee's Stefan Brunelle notes on Facebook that "you know as much as we do", and he's promised to send details to BGGN the week of June 24. As for a release date, Fabien from Matagot has noted on BGG that this crossover expansion is due out for Spiel 2013 in October.
• In other Spiel 2013 previews, German publisher KOSMOS has dropped basic information on its line-up for the latter half of 2013, and while some of the titles were already known – most prominently Michael Menzel's first expansion for Legends of Andor, Die Legenden von Andor: Der Sternenschild – many of them were not. The list of games coming from Kosmos includes:
-----• Nauticus, by Wolfgang Kramer and Michael Kiesling.
-----• Kashgar: Händler der Seidenstraße, a big box game from new designer Gerhard Hecht with artwork by Franz Vohwinkel and described in some detail below.
-----• Rabbids: Das Familien-Partyspiel, originally announced for the first half of 2013.
-----• Manno Monster, by Marco Teubner.
-----• The Walking Dead: Das Spiel, by Cory Jones, so apparently a German-language version of the 2011 Cryptozoic Entertainment release.
-----• Der Hobbit: Smaugs Einöde, by Andreas Schmidt, who previously designed Der Hobbit: Eine unerwartete Reise - Das Spiel zum Film for KOSMOS, a game based on the first Hobbit movie.
-----• Der Herr der Ringe, a new edition of the cooperative game by Reiner Knizia.
-----• Was ist Was: Das große Quiz, which was announced at Nürnberg 2013 as part of KOSMOS' "Play it smart" line of app/board game amalgamations.
-----• Die drei ??? und der Feuerdiamant, another "Play it smart" title, this one being a co-operative game by Reiner Knizia that features the three investigators.
-----• Die Siedler von Catan, a Klaus Teuber title you might have heard of previously, but now part of the "Play it smart" line, although I'm not sure what's been smarted up for this edition.
-----• Die Siedler von Wien, by Klaus Teuber, which I suspect is an Austrian version of Die Siedler von Catan: Deutschland-Edition or Settlers of America.
-----• Die Siedler von Catan: Entdecker & Piraten - Ergänzung für 5 & 6 Spieler, which allows up to six players in the Catan: Explorers & Pirates expansion.
-----• Nichtlustig: Noch mehr Labor Chaos
-----• Gregs Tagebuch: Heissa Mama!
-----• Indoor Curling, which might be a new version of Caveman Curling for all I know, but I'll hold off on creating a listing for it until later.
And while I know next-to-nothing about most of the titles listed above, a Kosmos editor has passed along a nice description of Gerhard Hecht's Kashgar, so here it is:
On his turn, a player performs only one action, choosing one of the cards on top of the three families and executing the action shown on that card. Then the card is put at the back of its family. To use the same family member again, a player must first use all the other cards on top of that family row.
These actions can influence the player's stock of spice, gold and mules. To keep track of that stock, each player has his own board with wooden markers that are moved accordingly. Actions can also bring new members to the family and can enable the player to fulfill one of six delivery request cards from the middle of the table. Finally are actions that mix things up a bit, such as by getting rid of a family member or even influencing other players' families.
The game ends when one player has earned a certain number of points by fulfilling delivery request cards.
The core mechanism of Kashgar could be called "open deck-building". The game plays quickly with little downtime. After having learned the different actions of the cards, players can start trying out different strategies and combinations of family members, family sizes, etc.
Palmyra is a tactical tile-laying game with few rules and high tactical choices. By placing new land tiles and moving your army and censor, you earn new tiles and coins for the Roman Empire. The most important thing is to not be too greedy when collecting taxes; otherwise future income may become sparse. Additionally, don't let tiles placed by your opponents cut you off, or else you'll be forced to lose valuable time. When all of the 120 coins are collected, the game ends, and whoever has collected the most coins wins.
Gameplay is built around the Yahtzee-style dice rolling and re-rolling system. On their dice, players are trying to roll sets of symbols that allow them to acquire cards; each round these cards give benefits of some kind, such as new symbols and special abilities. At the end of the game, each kind of card scores points for the player.