Carl,

Technically, I think you're right -- they don't have to identify themselves, and it might be premature to do so right now. But as a matter of strategy, I think they will soon make an announcement. Too many pilots could take offense at being denied information they feel entitled to, and vote against DPA simply because of the perceived insult. We do have big egos.
In any event, I think the correct names will be credibly leaked before the vote, perhaps by DALPA officials. If that happens, the DPA "founding fathers" will not falsely deny their identities, since a major point of this effort is "restoration of trust".

Best of luck, whatever you guys decide.