There is no shortage of new maps. There is a major shortage of "Meet the Pyro."
I have to say, though, I'm pessimistic about this TOP SECRET project. The MannCo. Store and the Replay feature are fine, but if this is anything other than updated creation kits or a server-side whitelisting program, I'm concerned.
If I had to take a wild, conspiracy theory guess, I'd say it's some kind of total Grordbort crossover having something to do with that cyborg Heavy in Foundry, possibly some kind of crazy new game mode.