CJ, if youre currently under contract with a reality tv show, then there was probably a pilot series filmed and sold to a network first. (Otherwise there would be no need for a contract)
ESPN doesn't do reality TV so I'm curious, what network purchased the show, what's it about, and when will we see it?
Certain things will probably fall under the nondisclosure, but there are usually no restrictions on mentioning the network or the subject of the show.
Also, are you really restricted from appearing on anyone else's video production, or are you just hoping to get paid for an appearance? If you are actually restricted then they screwed you pretty good.