JusticeLeaguer
Watchtower
I'm surprised a Dan Schnieder pilot wasn't ordered. He said he was developing a new project, and he is signed to Nick for 3 years. Have the execs lost faith in him? It could be a little too early, but if Sam & Cat continues to decline, or doesn't live up to expectation, it's going to have to be replaced.
Dan's been with Nick since the 90's so I don't see any reason why he'd leave now. Sure S&C's recent ratings haven't been great, but it's still Nick's highest rated live-action series so it's not going anywhere.
As for the other pilots, I agree that Twang and Matt's show (whose title will almost certainly change) have the most promise. Smart Alec sounds similar to ANT Farm but that could just be from lack of info at the moment.