Lets assume for a second, for argument sake, that you have some  valid reason not to disclose anything about your mining operation until February.  Here is what you could do to gain some level of trust: put a non trivial amount of bitcoins in escrow, only to be released back to you when you have proven beyond reasonable doubt your mining operation. And to be used to refund victims if you decide to run come March.

You claim to run a 3MW datacenter. Thats at least 4-5PH. Surely you could afford to put a few 100BTC in escrow for a few months?