This seems to have been missed during the Theros preview weeks but it seems "Huey" may likely be called Warlords of Khanar.
On September 9, 2013, WoTC filed for a trademark for "Warlords of Khanar" in the following categories:
IC 009. US 021 023 026 036 038. G & S: Interactive entertainment software, namely, video game programs; video game cartridges; multimedia computer game programs, computer game software, computer game cartridges, computer game discs, interactive video games of virtual reality comprised of computer hardware and software; downloadable software for use in playing computer games; computer game software for use with communication devices and mobile telephones; pre-recorded audio and video tapes featuring music; laser discs, video discs, phonograph records, compact discs, and pre-recorded cd-roms, all featuring games, films, and music; downloadable electronic publications in the nature of e-books in the field of fantasy adventures
IC 028. US 022 023 038 050. G & S: Card games, trading card games, playing cards and accessories for use therewith; computer and video game apparatus, namely, video game machines for use with televisions
IC 041. US 100 101 107. G & S: Entertainment services, namely, providing online computer games and interactive multiplayer online computer games via a global network; organizing and conducting online computer game tournaments and exhibitions in the field of games; providing industry information online via a global network, namely, online publications in the nature of articles and magazines on games and gaming; production and distribution of motion pictures and an ongoing television game show; providing online publications in the nature of e-books in the field of fantasy adventures
If true, here's hoping the returning mechanic is either Horsemanship or Flanking.