I don't know where (links please!) it has been stated by the Teamsters that they are going to try and stop planes from landing.
As others have posted, Teamsters don't control Air Traffic Control, they're not going to be standing out on the runway when the aircraft tries to land.
All Teamsters can do is a 'slow down' from their members involved with servicing the aircraft which could cause delays.
Too much unfounded conjecture out there.