According to a poster the Doctor Who art department have been working on Mummified Cybermen. Apparently the Cybermen involved are redesigned classic series Cybermen rather than the 2006 Cybus variety. Earlier in the year there were hints that an episode would be set in Egypt that were later enhanced when a Guardian article claimed that an interactive DVD was being created to accompany an Egypt-themed episode of the series.
Source: Doctor Who Spoilers
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